acinclude.m4 ([GLIBCXX_CHECK_CLOCK_GETTIME]): Reinstate clock_gettime search, but only in libposix4, never link librt.

2008-08-01  Paolo Bonzini  <bonzini@gnu.org>
	    Chris Fairles  <chris.fairles@gmail.com>

	* acinclude.m4 ([GLIBCXX_CHECK_CLOCK_GETTIME]): Reinstate clock_gettime
	search, but only in libposix4, never link librt.
	* src/Makefile.am: Reinstate previous change to add GLIBCXX_LIBS.
        * configure: Regenerate.
        * configure.in: Likewise.
        * Makefile.in: Likewise.
        * src/Makefile.in: Likewise.
        * libsup++/Makefile.in: Likewise.
        * po/Makefile.in: Likewise.
        * doc/Makefile.in: Likewise.

Co-Authored-By: Chris Fairles <chris.fairles@gmail.com>

From-SVN: r138519