Update googletest to latest revision.

Fixes Visual Studio build issues.

Bug swiftshader:115

Change-Id: Ibd09f4de84a115ed1b264b36985d2d4f31fb3a97
Reviewed-on: https://swiftshader-review.googlesource.com/20269
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
diff --git a/third_party/googletest b/third_party/googletest
index 0fe9660..02a8ca8 160000
--- a/third_party/googletest
+++ b/third_party/googletest
@@ -1 +1 @@
-Subproject commit 0fe96607d85cf3a25ac40da369db62bbee2939a5
+Subproject commit 02a8ca87735601466d8c564344f9be493da84708