clang/test/Misc/permissions.cpp: Suppress this on MSYS with the feature 'shell-preserves-root'.

FIXME: Could we introduce another feature for it?

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@185797 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Misc/permissions.cpp b/test/Misc/permissions.cpp
index 83f6c57..5b89eab 100644
--- a/test/Misc/permissions.cpp
+++ b/test/Misc/permissions.cpp
@@ -1,5 +1,9 @@
 // REQUIRES: shell
 
+// MSYS doesn't emulate umask.
+// FIXME: Could we introduce another feature for it?
+// REQUIRES: shell-preserves-root'
+
 // RUN: umask 000
 // RUN: %clang_cc1 -emit-llvm-bc %s -o %t
 // RUN: ls -l %t | FileCheck --check-prefix=CHECK000 %s