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/dagcombine-concatvector.ll b/llvm/test/CodeGen/ARM/dagcombine-concatvector.ll
index e9e0fe3..d8c6c64 100644
--- a/llvm/test/CodeGen/ARM/dagcombine-concatvector.ll
+++ b/llvm/test/CodeGen/ARM/dagcombine-concatvector.ll
@@ -1,7 +1,7 @@
 ; RUN: llc < %s -mtriple=thumbv7s-apple-ios3.0.0 | FileCheck %s
 
 ; PR15525
-; CHECK: test1:
+; CHECK-LABEL: test1:
 ; CHECK: ldr.w	[[REG:r[0-9]+]], [sp]
 ; CHECK-NEXT: vmov	{{d[0-9]+}}, r1, r2
 ; CHECK-NEXT: vmov	{{d[0-9]+}}, r3, [[REG]]