Add script for triggering Buildbucket builds
Add script for triggering Buildbucket builds

BUG=493885
TESTED=See https://paste.googleplex.com/5622248052359168

Review URL: https://codereview.chromium.org/1164363003

git-svn-id: fd409f4bdeea2bb50a5d34bb4d4bfc2046a5a3dd@295569 0039d316-1c4b-4281-b951-d872f2087c98

hsharsha/depot_tools,azunite/chrome_build,chinmaygarde/depot_tools,mlufei/depot_tools,chinmaygarde/depot_tools,aleonliao/depot_tools,duanwujie/depot_tools,cpanelli/-git-clone-https-chromium.googlesource.com-chromium-tools-depot_tools,duongbaoduy/gtools,SuYiling/chrome_depot_tools,fracting/depot_tools,gcodetogit/depot_tools,mlufei/depot_tools,fracting/depot_tools,SuYiling/chrome_depot_tools,azunite/chrome_build,Midrya/chromium,cpanelli/-git-clone-https-chromium.googlesource.com-chromium-tools-depot_tools,gcodetogit/depot_tools,hsharsha/depot_tools,kaiix/depot_tools,ajohnson23/depot_tools,azureplus/chromium_depot_tools,Midrya/chromium,chinmaygarde/depot_tools,azunite/chrome_build,CoherentLabs/depot_tools,hsharsha/depot_tools,CoherentLabs/depot_tools,aleonliao/depot_tools,primiano/depot_tools,duongbaoduy/gtools,duongbaoduy/gtools,SuYiling/chrome_depot_tools,kaiix/depot_tools,duanwujie/depot_tools,primiano/depot_tools,disigma/depot_tools,ajohnson23/depot_tools,azureplus/chromium_depot_tools,cpanelli/-git-clone-https-chromium.googlesource.com-chromium-tools-depot_tools,duanwujie/depot_tools,mlufei/depot_tools,Midrya/chromium,aleonliao/depot_tools,disigma/depot_tools,ajohnson23/depot_tools,gcodetogit/depot_tools,fracting/depot_tools,kaiix/depot_tools,disigma/depot_tools,azureplus/chromium_depot_tools,primiano/depot_tools