[bugpoint] Also remove comdat's from externalized GVs

We were removing comdats from externalized functions (function declarations
can't be comdat), but were not doing the same for variable. Failure to do this
would cause bugpoint to fail ("Declaration may not be in a Comdat!").

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@299908 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed