Fix pex_wait status value.

Shift return code so it isn't misinterpreted as a terminating signal.

Change-Id: I95e306af5df0bd3a01b8c92ee45de17fc5bab7a4
diff --git a/patches/gcc-patch.txt b/patches/gcc-patch.txt
index 486c52f..69bacaf 100644
--- a/patches/gcc-patch.txt
+++ b/patches/gcc-patch.txt
@@ -1134,7 +1134,7 @@
 !   if (procinfo_result != NO_ERROR)
 !     return -1;
 ! 
-!   *status = proc_info.return_code;
+!   *status = (proc_info.return_code & 0xff) << 8;
 !   return pid;
 ! }
 !