* automake.in (scan_autoconf_traces) <AC_SUBST>: Ignore ANSI2KNR

* automake.in (scan_autoconf_traces) <AC_SUBST>: Ignore ANSI2KNR
and AMDEPBACKSLASH.
* tests/distcommon2.test: Use a full configure.in that calls AC_INIT.
* tests/ext.test: Enable dependencies for OBJC.
* tests/libobj.test, tests/libobj6.test, tests/libobj9.test:
Delete.  They tests for different flavors of $LIBOBJS assignments
that wont be supported anymore.
* tests/libobj2.test, tests/libobj10.test: Use AC_LIBOBJ.
* tests/obsolete.test: Don't test Automake.
* tests/suffix5.test: Require libtool.
* tests/Makefile.am (TESTS): Remove libobj.test, libobj6.test and
libobj9.test.