re PR rtl-optimization/79003 (r238991 breaks ODR)

	PR bootstrap/79003
	* Makefile.in (CFLAGS, CPPFLAGS, LDFLAGS): Remove -fno-lto.
	(NOLTO_FLAGS): New variable.
	(ALL_CFLAGS): Use it.
	* configure.ac (nolto_flags): New ACX_PROG_CC_WARNING_OPTS,
	check for whether -fno-lto works.
	* configure: Regenerated.

From-SVN: r244208