Merging r322350, r322405, r322420, r322593:

------------------------------------------------------------------------
r322350 | rtrieu | 2018-01-11 20:42:27 -0800 (Thu, 11 Jan 2018) | 6 lines

[ODRHash] Don't hash friend functions.

In certain combinations of templated classes and friend functions, the body
of friend functions does not get propagated along with function signature.
Exclude friend functions for hashing to avoid this case.

------------------------------------------------------------------------

------------------------------------------------------------------------
r322405 | rtrieu | 2018-01-12 13:49:20 -0800 (Fri, 12 Jan 2018) | 2 lines

Disable test for Windows to fix Windows buildbots.

------------------------------------------------------------------------

------------------------------------------------------------------------
r322420 | rtrieu | 2018-01-12 15:13:33 -0800 (Fri, 12 Jan 2018) | 2 lines

Try to suppress Windows testing again.

------------------------------------------------------------------------

------------------------------------------------------------------------
r322593 | rtrieu | 2018-01-16 11:53:06 -0800 (Tue, 16 Jan 2018) | 6 lines

Add context to why test was disabled on Windows

test/Modules/odr_hash-Friend.cpp triggers an assertion in MicrosoftMangle.cpp
This has been reported in PR35939


------------------------------------------------------------------------


git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_60@322632 91177308-0d34-0410-b5e6-96231b3b80d8