- Update to version 1.8.1:
* add pkg-config files
* add --no_stacktrace_support for json-output-unittest
* allow macros inside of parametrized test names.
* support JSON output format in addition to XML
* add options to parallelize builds
* fix double free when building Gtest/GMock in shared libraries
and linking a test executable with both.
* 2.6.4 is the minimum CMake version
- cleanup spec file
- googletest-fix-cmake-libdir-install.patch: dropped, upstreamed