Update cros_mark_as_stable_unittest.py to pass again.

cros_mark_as_stable_unittest.py

Index: cros_mark_as_stable_unittest.py
diff --git a/cros_mark_as_stable_unittest.py b/cros_mark_as_stable_unittest.py
index 111cd83dd6a9ffaa4ff47ce20f20a91def93ce01..ce5152f5b5fefe8579f9a85b318fa30f46f1e552 100755
--- a/cros_mark_as_stable_unittest.py
+++ b/cros_mark_as_stable_unittest.py
@@ -116,9 +116,10 @@ class EBuildTest(mox.MoxTestBase):
 
   def testFindEBuildPath(self):
     self.mox.StubOutWithMock(cros_mark_as_stable, '_SimpleRunCommand')
-    cros_mark_as_stable._SimpleRunCommand(
-        'equery-x86-generic which %s 2> /dev/null' % self.package).AndReturn(
-            self.ebuild_path)
+    cmd = ('ACCEPT_KEYWORDS="x86 arm amd64" '
+           'equery-x86-generic which %s 2> /dev/null')
+    cros_mark_as_stable._SimpleRunCommand(cmd % self.package).AndReturn(
+        self.ebuild_path)
     self.mox.ReplayAll()
     path = cros_mark_as_stable._EBuild._FindEBuildPath(self.package)
     self.mox.VerifyAll()