[PATCH] llvm-cov: Updated file checksum to be timestamp.

[Nick Lewycky]

Yuchen Wu wrote:
> llvm-cov: Updated file checksum to be timestamp.
>
> Instead of permanently outputting "MVLL" as the file checksum, clang
> will stamp the gcno and gcda checksums with the time of compile.

Absolutely not. The compiler must generate identical outputs when it is 
run twice. Please find another way to pick a checksum.

Nick

  This
> allows for llvm-cov to check if the two gcov files are synchronized.
>
> Regenerated the test files so they contain the timestamp. Also added
> negative test to ensure error when the checksums don't match. 		 	   		
>
>
>
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