conformtest: clean up POSIX expectations for semaphore.h, signal.h, tar.h.

conformtest: clean up POSIX expectations for semaphore.h, signal.h, tar.h.

Continuing the series of patches to clean up conformtest expectations
for "POSIX" (1995/6) based on review of the expectations against the
standard, this patch cleans up those for semaphore.h, signal.h and
tar.h (including various corrections for other standards for the
expectations affected by this patch).  Tested x86_64.

(Some of the failures for signal.h shown up by this patch correcting
expectations for that header are among the reasons for posix/annexc
being expected to fail.  The goal is for conformtest eventually to
replace posix/annexc and stdlib/isomac once it has all relevant
functionality, and for the loop over standards and headers in
conformtest to convert to separate makefile targets for each
combination, so they can be run in parallel and so that xfails can be
more specific than the present xfailing of the whole of conformtest.)

	* conform/conformtest.pl: Allow ' and \ in values given for
	constants.
	* conform/data/semaphore.h-data [POSIX] (fcntl.h): Allow header
	inclusion.
	[POSIX] (sys/types.h): Likewise.
	[POSIX2008 || XOPEN2K8] (sys/types.h): Don't allow header
	inclusion.
	[POSIX || UNIX98 || XOPEN2K] (time.h): Don't allow header
	inclusion.
	* conform/data/signal.h-data (SIGIO): Remove expectation.
	[XPG3] (SIGBUS): Do not expect.
	[POSIX || XPG3] (SIGPOLL): Likewise.
	[POSIX || XPG3] (SIGPROF): Likewise.
	[POSIX || XPG3] (SIGSYS): Likewise.
	[XPG3] (SIGTRAP): Likewise.
	[POSIX || XPG3] (SIGURG): Likewise.
	[POSIX || XPG3] (SIGVTALRM): Likewise.
	[POSIX || XPG3] (SIGXCPU): Likewise.
	[POSIX || XPG3] (SIGXFSZ): Likewise.
	[POSIX] (SA_SIGINFO): Expect.
	[XPG3] (siginfo_t): Do not expect type or contents.
	[POSIX] (si_pid): Do not expect element.
	[POSIX] (si_uid): Likewise.
	[POSIX] (si_addr): Likewise.
	[POSIX] (si_status): Likewise.
	[POSIX] (si_band): Likewise.
	[XPG4] (si_value): Likewise.
	[POSIX || XPG3] (ILL_ILLOPC): Do not expect.
	[POSIX || XPG3] (ILL_ILLOPN): Likewise.
	[POSIX || XPG3] (ILL_ILLADR): Likewise.
	[POSIX || XPG3] (ILL_ILLTRP): Likewise.
	[POSIX || XPG3] (ILL_PRVOPC): Likewise.
	[POSIX || XPG3] (ILL_PRVREG): Likewise.
	[POSIX || XPG3] (ILL_COPROC): Likewise.
	[POSIX || XPG3] (ILL_BADSTK): Likewise.
	[POSIX || XPG3] (FPE_INTDIV): Likewise.
	[POSIX || XPG3] (FPE_INTOVF): Likewise.
	[POSIX || XPG3] (FPE_FLTDIV): Likewise.
	[POSIX || XPG3] (FPE_FLTOVF): Likewise.
	[POSIX || XPG3] (FPE_FLTUND): Likewise.
	[POSIX || XPG3] (FPE_FLTRES): Likewise.
	[POSIX || XPG3] (FPE_FLTINV): Likewise.
	[POSIX || XPG3] (FPE_FLTSUB): Likewise.
	[POSIX || XPG3] (SEGV_MAPERR): Likewise.
	[POSIX || XPG3] (SEGV_ACCERR): Likewise.
	[POSIX || XPG3] (BUS_ADRALN): Likewise.
	[POSIX || XPG3] (BUS_ADRERR): Likewise.
	[POSIX || XPG3] (BUS_OBJERR): Likewise.
	[POSIX || XPG3] (CLD_EXITED): Likewise.
	[POSIX || XPG3] (CLD_KILLED): Likewise.
	[POSIX || XPG3] (CLD_DUMPED): Likewise.
	[POSIX || XPG3] (CLD_TRAPPED): Likewise.
	[POSIX || XPG3] (CLD_STOPPED): Likewise.
	[POSIX || XPG3] (CLD_CONTINUED): Likewise.
	[POSIX || XPG3] (POLL_IN): Likewise.
	[POSIX || XPG3] (POLL_OUT): Likewise.
	[POSIX || XPG3] (POLL_MSG): Likewise.
	[POSIX || XPG3] (POLL_ERR): Likewise.
	[POSIX || XPG3] (POLL_PRI): Likewise.
	[POSIX || XPG3] (POLL_HUP): Likewise.
	[POSIX || XPG3 || POSIX2008] (TRAP_BRKPT): Likewise.
	[POSIX || XPG3 || POSIX2008] (TRAP_TRACE): Likewise.
	(SIG*): Do not allow.
	[XPG3] (si_*): Likewise.
	[XPG3] (SI_*): Likewise.
	[XPG3 || XPG4] (sigev_*): Likewise.
	[XPG3 || XPG4] (SIGEV_*): Likewise.
	[XPG3 || XPG4] (sival_*): Likewise.
	[POSIX || XPG3 || XPG4] (uc_*): Likewise.
	[POSIX || XPG3] (BUS_*): Likewise.
	[POSIX || XPG3] (CLD_*): Likewise.
	[POSIX || XPG3] (FPE_*): Likewise.
	[POSIX || XPG3] (ILL_*): Likewise.
	[POSIX || XPG3] (POLL_*): Likewise.
	[POSIX || XPG3] (SEGV_*): Likewise.
	[POSIX || XPG3 || POSIX2008] (SS_*): Likewise.
	[POSIX || XPG3 || POSIX2008] (SV_*): Likewise.
	[POSIX || XPG3 || POSIX2008] (TRAP_*): Likewise.
	[POSIX || XPG3 || POSIX2008] (ss_*): Likewise.
	[POSIX || XPG3 || POSIX2008] (sv_*): Likewise.
	* conform/data/tar.h-data (TMAGLEN): Use macro-int-constant.
	Specify type and value.
	(TVERSLEN): Likewise.
	(REGTYPE): Likewise.
	(AREGTYPE): Likewise.
	(LNKTYPE): Likewise.
	(SYMTYPE): Likewise.
	(CHRTYPE): Likewise.
	(BLKTYPE): Likewise.
	(DIRTYPE): Likewise.
	(FIFOTYPE): Likewise.
	(CONTTYPE): Likewise.
	(TSUID): Likewise.
	(TSGID): Likewise.
	(TSVTX): Likewise.
	(TUREAD): Likewise.
	(TUWRITE): Likewise.
	(TUEXEC): Likewise.
	(TGREAD): Likewise.
	(TGWRITE): Likewise.
	(TGEXEC): Likewise.
	(TOREAD): Likewise.
	(TOWRITE): Likewise.
	(TOEXEC): Likewise.
	[POSIX] (TSVTX): Expect constant.