llvm-objcopy/test: add REQUIRES: shell for use of umask

(follow-up to r365162)

llvm-svn: 366755

llvm/test/tools/llvm-objcopy/ELF/mirror-permissions-unix.test

@@ -6,6 +6,7 @@
 ## Setting the umask to 0 ensures deterministic permissions across
 ## test environments.
 # UNSUPPORTED: system-windows
+# REQUIRES: shell
 
 # RUN: touch %t
 # RUN: chmod 0777 %t

llvm/test/tools/llvm-objcopy/ELF/respect-umask.test

@@ -4,6 +4,7 @@
 ## Windows has no umask so this test makes no sense, nor would
 ## it work because there is no umask(1) in a Windows environment
 # UNSUPPORTED: system-windows
+# REQUIRES: shell
 
 # RUN: rm -f %t
 # RUN: touch %t