When attempting to load a module that is not in the module cache,

When attempting to load a module that is not in the module cache,
return the module itself (in the module map) rather than returning the
umbrella header used to build the module. While doing this, make sure
that we're inferring modules for frameworks to build that module.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145310 91177308-0d34-0410-b5e6-96231b3b80d8