acinclude.m4: Allow OPTIMIZE_CXXFLAGS to be set by configure.host.

2006-12-02  Howard Hinnant  <hhinnant@apple.com>

	* acinclude.m4: Allow OPTIMIZE_CXXFLAGS to be set by configure.host.
	* configure.host: Set OPTIMIZE_CXXFLAGS to -fvisibility-inlines-hidden
	for x86/darwin.
	* configure: Regenerate.

From-SVN: r119450