Move -march to high version to get required support

	* configure.ac: move -march to a high chip level to get the
	required support.
	* configure: Regenerated
	* Makefile.in: Likewise.
	* aclocal.m4: Likewise.
	* examples/Makefile.in: Likewise.
	* src/Makefile.in: Likewise.

Signed-off-by: Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>