[MIPS] debuggerd and libcorkscrew support

Change-Id: I5a241dc2e470148be0ad2c138e31f1aba5ab8812
diff --git a/debuggerd/tombstone.c b/debuggerd/tombstone.c
index 27ab3fe..012337b 100644
--- a/debuggerd/tombstone.c
+++ b/debuggerd/tombstone.c
@@ -76,7 +76,9 @@
     case SIGFPE:     return "SIGFPE";
     case SIGSEGV:    return "SIGSEGV";
     case SIGPIPE:    return "SIGPIPE";
+#ifdef SIGSTKFLT
     case SIGSTKFLT:  return "SIGSTKFLT";
+#endif
     case SIGSTOP:    return "SIGSTOP";
     default:         return "?";
     }