VisualStudio 2015 bots fail with more recent googletest versions

[dneto0]

I'm getting segfault and stack overflow failures in the bots.

The signature of the failure is:

  4 - spirv-tools-test_spirv_unit_tests (SEGFAULT)
  9 - spirv-tools-test_opt (Exit code 0xc0000409
 17 - spirv-tools-test_val_abcde (SEGFAULT)
 18 - spirv-tools-test_val_capability (Exit code 0xc0000409
 20 - spirv-tools-test_val_fghijklmnop (SEGFAULT)
 21 - spirv-tools-test_val_stuvw (SEGFAULT)

Via #1147 I've bisected so that I found

The first bad revision of googletest: 2cf1f99b97e5a50b5d9db3d5450a6b474e36b79b The last good revision of googletest: 0555b0eacbc56df1fd762c6aa87bb84be9e4ce7e

[dneto0]

The bad commit came from a migration from inside Google. So I filed internal issue 173112492