Strip binaries on clobber builders.
Strip binaries on clobber builders.

Currently, they're either not building with debugging symbols (linux),
or strip the binaries anyway (mac), but I want to change both.

To not regress the sizes results by ~1500%, the clobber builders should
strip their binaries.

BUG=315598
R=mark@chromium.org,tonyg@chromium.org,thakis@chromium.org

Review URL: https://codereview.chromium.org/66903002

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@233951 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build