Need to run git cache exists in a directory we know for sure that exists
Need to run git cache exists in a directory we know for sure that exists

We don't want to run it in the DEPS directory, which is apperently what
the default behavior is.

BUG=339171

Review URL: https://codereview.chromium.org/184793003

git-svn-id: fd409f4bdeea2bb50a5d34bb4d4bfc2046a5a3dd@254266 0039d316-1c4b-4281-b951-d872f2087c98

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