* configure.ac: Move BUILD_CONFIG set up earlier.  Add
	--enable-vtable-verify option parsing.  Don't add
	target-libsanitizer to bootstrap_target_libs unless
	--with-build-config=bootstrap-asan or
	--with-build-config=bootstrap-ubsan.  Don't add target-libvtv
	to bootstrap_target_libs unless --enable-vtable-verify.
	* configure: Regenerated.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@208745 138bc75d-0d04-0410-961f-82ee72b054a4