Infer "link" lines for top-level frameworks. Essentially, a framework
will have a shared library with the same name as its framework (and no
suffix!) within its .framework directory. Detect this both when
inferring the whole top-level framework and when parsing a module map.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172439 91177308-0d34-0410-b5e6-96231b3b80d8