Merge r312043 into the 5.0 branch : [cmake] Stop putting the revision info in LLVM_VERSION_STRING

[tstellar]

Bugzilla Link	35079
Resolution	FIXED
Resolved on	Nov 15, 2017 14:27
Version	5.0
OS	All
Blocks	#33840
CC	@rnk
Fixed by commit(s)	r312043 r318344

Extended Description

Is it OK to merge the following revision(s) to the 5.0 branch?

[tstellar]

https://reviews.llvm.org/rL312043

[rnk]

If the 5.0 branch contains r306858, I would definitely support merging it. Otherwise, it's not very important.

[tstellar]

Merged: r318344