Bump the number of parallel jobs for creating branches to 16.
Bump the number of parallel jobs for creating branches to 16.

Currently, we only use 4 parallel jobs when creating branches. This is
relatively slow. Bump the number of parallel jobs to 16 to speed things
up.

BUG=none
TEST=Create a branch and notice it's a lot faster.

Change-Id: I345dc43ea07a6706124416487d7096332ec5eaea
Reviewed-on: https://chromium-review.googlesource.com/177292
Reviewed-by: Yu-Ju Hong <52dc720c411f8e2156e608c1a8b894a917489667@chromium.org>
Reviewed-by: Vadim Shtayura <9f116ddb1b24f6fc1916a676eb17161b6c07dfc1@chromium.org>
Tested-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>
Commit-Queue: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>

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