Blender Git Loki

Fix gtest linking on ubuntu and do minor cleanup.

Generally for build systems, libraries that do not depend on other
libraries, such as system libraries, OpenGL etc always go at the end.

We could even get rid of some duplicate dependency libraries here but
auto duplication by build systems and differences between OSs make this
difficult.

GTest still duplicates all libraries twice to solve some issues which is
weird (maybe libs are not sorted correctly for some reason? needs
investigation)