Fix bug where we were only applying the last local patch.
Fix bug where we were only applying the last local patch.

BUG=None
TEST=Verified multiple local patches are being applied.

Change-Id: I5b2e60b1b5d5dd06fd08c3e88241bace38ce8e7e
Reviewed-on: http://gerrit.chromium.org/gerrit/3824
Reviewed-by: Ryan Cui <5ce1592d53754a87a44fc2eb7b63d5f77cf50fdb@chromium.org>
Tested-by: Ryan Cui <5ce1592d53754a87a44fc2eb7b63d5f77cf50fdb@chromium.org>

zhang0137/chromite,coreos/chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,coreos/chromite,coreos/chromite,bpsinc-native/src_third_party_chromite,zhang0137/chromite,chadversary/chromiumos.chromite,zhang0137/chromite,chadversary/chromiumos.chromite