Subzero: Fix a new test under MINIMAL mode.

It tests dump output and therefore requires allow_dump.

BUG= https://code.google.com/p/nativeclient/issues/detail?id=4212
R=jvoung@chromium.org

Review URL: https://codereview.chromium.org/1214043002.
diff --git a/tests_lit/llvm2ice_tests/cond-br-same-target.ll b/tests_lit/llvm2ice_tests/cond-br-same-target.ll
index dc7902d..6863b1f 100644
--- a/tests_lit/llvm2ice_tests/cond-br-same-target.ll
+++ b/tests_lit/llvm2ice_tests/cond-br-same-target.ll
@@ -1,5 +1,6 @@
 ; Test conditional branch where targets are the same.
 ; Tests issue: https://code.google.com/p/nativeclient/issues/detail?id=4212
+; REQUIRES: allow_dump
 
 ; RUN: %p2i -i %s --insts | FileCheck %s