Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion.

This was done with the following sed invocation to catch label lines demarking function boundaries:
    sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll
which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct.

llvm-svn: 186258
diff --git a/llvm/test/CodeGen/ARM/2011-11-09-BitcastVectorDouble.ll b/llvm/test/CodeGen/ARM/2011-11-09-BitcastVectorDouble.ll
index 2ab6a4f..42eb32d 100644
--- a/llvm/test/CodeGen/ARM/2011-11-09-BitcastVectorDouble.ll
+++ b/llvm/test/CodeGen/ARM/2011-11-09-BitcastVectorDouble.ll
@@ -7,7 +7,7 @@
 declare <2 x i16> @foo_v2i16(<2 x i16>) nounwind
 
 define void @test_neon_call_return_v2i16() {
-; CHECK: test_neon_call_return_v2i16:
+; CHECK-LABEL: test_neon_call_return_v2i16:
   %1 = load <2 x i16>* @src1_v2i16
   %2 = call <2 x i16> @foo_v2i16(<2 x i16> %1) nounwind
   store <2 x i16> %2, <2 x i16>* @res_v2i16