[mips] Fixup r309940.

Needed a // REQUIRES: mips-registered-target


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@309942 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/mips-uninit-const-in-ro.c

@@ -3,6 +3,8 @@
 // RUN:            -membedded-data=1 -muninit-const-in-rodata -o - %s | \
 // RUN:   FileCheck %s
 
+// REQUIRES: mips-registered-target
+
 // Test that -muninit-const-in-rodata places constant uninitialized structures
 // in the .rodata section rather than the commeon section.