Emit the globals, metadata, etc. associated with static variables even when

Emit the globals, metadata, etc. associated with static variables even when
they're unreachable.  This matters because (if they're POD, or if this is C)
the scope containing the variable might be reachable even if the variable
isn't.  Fixes PR7044.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@103052 91177308-0d34-0410-b5e6-96231b3b80d8