initial import of GCC 4.8 snapshot 2014-10-09.  this fixes at
least the below GCC PRs, among many other changes.

it also makes sh3 reasonably useful again.

	c++/60731
	c/61271
	c/61271
	c/61271
	debug/55794
	debug/60655
	debug/61923
	debug/63284
	debug/63342
	inline-asm/63282
	ipa/61986
	ipa/62015
	libobjc/61920
	libobjc/61920
	libstdc++/58962
	libstdc++/60734
	libstdc++/60966
	libstdc++/61946
	libstdc++/63449
	middle-end/61010
	middle-end/61045
	middle-end/62103
	rtl-optimization/57003
	rtl-optimization/60866
	rtl-optimization/60901
	rtl-optimization/61801
	rtl-optimization/62004
	rtl-optimization/62030
	target/49423
	target/52941
	target/61044
	target/61202
	target/61208
	target/61231
	target/61239
	target/61249
	target/61300
	target/61423
	target/61431
	target/61443
	target/61483
	target/61542
	target/61545
	target/61570
	target/61586
	target/61996
	target/62195
	target/62218
	target/63428
	tree-optimization/60196
	tree-optimization/61375
	tree-optimization/61383
	tree-optimization/61452
	tree-optimization/61684
	tree-optimization/61964
	tree-optimization/62073
	tree-optimization/62075
	tree-optimization/63189
	tree-optimization/63341
	tree-optimization/63375