[Patch] Fix HP_SMALL_TIMING_AVAIL undef warnings

[Steve Ellcey]

Here is a new *untested* patch for the HP_SMALL_TIMING_AVAIL warnings but
the patch actually does much more then get rid of these warnings.  There
was a lot of duplication in the various platform hp-timing.h header files,
but these were all different then the generic hp-timing.h header file which
assumes you are not implementing any timing functionality.  So I created 
a generic hp-timing-enabled.h header file, put the macros in there and
had the various platform files include that.

The two macros I did not define in hp-timing-enabled.h are HP_TIMING_NOW
and HP_TIMING_ACCUM.  These are pretty different across all the targets
and so I left each target to define its own.  I also couldn't put the
typedef of hp_timing_t in the shared file because it is different for
one target (alpha), where it is 32 bits instead of 64 like it is on the
other targets, but I did create a default HP_TIMING_TYPE that could
be used in the hp_timing_t typedef declaration for each target and only
alpha had to redefine it.

This isn't ready for checkin since it isn't tested (I did do a build on
x86) but I was hoping someone could review it for design issues and
that the various platform maintainers for the platforms affected by the
change (x86, alpha, sparc, ia64, powerpc) could try it out.

Steve Ellcey
sellcey@mips.com


2014-04-30  Steve Ellcey  <sellcey@mips.com>

	* sysdeps/generic/hp-timing-enabled.h: New file.
	* sysdeps/generic/hp-timing.h (HP_SMALL_TIMING_AVAIL):
	Set default value.
	* sysdeps/powerpc/powerpc32/hp-timing.h (HP_SMALL_TIMING_AVAIL): Ditto.
	* sysdeps/alpha/hp-timing.h: Include hp-timing-enabled.h to get
	default defintions of HP_TIMING_* macros.
	* sysdeps/i386/i686/hp-timing.h: Ditto.
	* sysdeps/ia64/hp-timing.h: Ditto.
	* sysdeps/powerpc/powerpc32/power4/hp-timing.h: Ditto.
	* sysdeps/powerpc/powerpc64/hp-timing.h: Ditto.
	* sysdeps/sparc/sparc32/sparcv9/hp-timing.h: Ditto.
	* sysdeps/sparc/sparc64/hp-timing.h: Ditto.
	* elf/dl-support.c: Use #if to check HP_SMALL_TIMING_AVAIL.
	* elf/rtld.c: Ditto.




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