Disable MemMapTest.MapAnonymousExactAddr32bitHighAddr on MIPS32.

This test case is failing on a Creator Ci20 development
board because of memory allocation limitations.

Bug: 26635783
Change-Id: I02f1012f8005fd516aac82412c71af7a4652a80c
diff --git a/runtime/mem_map_test.cc b/runtime/mem_map_test.cc
index 2f903c8..81c855e 100644
--- a/runtime/mem_map_test.cc
+++ b/runtime/mem_map_test.cc
@@ -251,6 +251,10 @@
 #endif
 
 TEST_F(MemMapTest, MapAnonymousExactAddr32bitHighAddr) {
+  // Some MIPS32 hardware (namely the Creator Ci20 development board)
+  // cannot allocate in the 2GB-4GB region.
+  TEST_DISABLED_FOR_MIPS();
+
   CommonInit();
   // This test may not work under valgrind.
   if (RUNNING_ON_MEMORY_TOOL == 0) {