On FreeBSD, we don't want 'getDriver().Dir + "/../lib"' added to the
ToolChain's FilePaths. If clang is installed as a port in /usr/local,
it is *not* supposed to use /usr/local/lib by default, for example.
Additionally, there are no clang-related executables in either
/usr/libexec, or getDriver().Dir + "/../libexec", anymore, so remove
that from the ToolChain's ProgramPaths.
Patch by Dimitry Andric!
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126760
91177308-0d34-0410-b5e6-
96231b3b80d8