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/Hexagon/adde.ll b/llvm/test/CodeGen/Hexagon/adde.ll
index 9cee3e2..6d060c1 100644
--- a/llvm/test/CodeGen/Hexagon/adde.ll
+++ b/llvm/test/CodeGen/Hexagon/adde.ll
@@ -31,4 +31,4 @@
         %tmp2122 = trunc i128 %tmp21 to i64
         store i64 %tmp2122, i64* %RH
         ret void
-}
\ No newline at end of file
+}