[PATCH] Preprocessor: improve ACLE 6.4 support

[Renato Golin]

With Tim's comment fixed, LGTM.

================
Comment at: test/Preprocessor/arm-acle-6.4.c:7
@@ +6,3 @@
+// CHECK-CORTEX-M0: __ARM_ARCH_ISA_THUMB 1
+// CHECK-CORTEX-M0: __ARM_ARCH_PROFILE M
+
----------------
Tim Northover wrote:
> Just noticed this one, and I think it might be a misinterpretation of the ACLE. I would expect this to be the character value 'M' rather than some isolated token.
> 
> A quick GCC test suggests this is how they do it ("#define __ARM_ARCH_PROFILE 65" for Cortex-A15, which is also dodgy in C++ mode, but less so).
I'd prefer a quoted char.

http://reviews.llvm.org/D4146