Rename Attributes.gen, Intrinsics.gen to Attributes.inc, Intrinsics.inc

Virtually all other tablegen outputs are called .inc, not .gen, so rename these two too for consistency.
No behavior change.

https://reviews.llvm.org/D46058


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@330843 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed