Merge commit 'a22324447c1f' from apple/stable/20190619 into swift/master

Author: git apple-llvm automerger

clang/test/Driver/flang/flang.f90

@@ -1,6 +1,7 @@
-! D63607 made mac builders unhappy by failing this test, and it isn't
+! D63607 made mac and Fedora builders unhappy by failing this test, and it isn't
 ! yet obvious why. Mark as unsupported as a temporary measure.
 ! UNSUPPORTED: darwin
+! UNSUPPORTED: linux
 
 ! Check that flang -fc1 is invoked when in --driver-mode=flang.