Under certain terrible circumstances (<rdar://problem/10805775>),

Under certain terrible circumstances (<rdar://problem/10805775>),
top-level frameworks can actually be symlinked over to embedded
frameworks, and accessed via the top-level framework's headers. In
this case, we need to determine that the framework was *actually* an
embedded framework, so we can load the appropriate top-level module.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164620 91177308-0d34-0410-b5e6-96231b3b80d8