Change the warning message for -Wincomplete-umbrella to report the location of the umbrella header;
Differential Revision: https://reviews.llvm.org/D82118
One of the -Wincomplete-umbrella warnings diagnoses when a header is present in
the directory but it's not present in the umbrella header. Currently, this
warning only happens on top level modules; any submodule using an umbrella
header does not get this warning. Fix that by also considering the submodules.
Differential Revision: https://reviews.llvm.org/D32576
rdar://problem/22623686
llvm-svn: 301597