gclient: fix patch_project handling for the recipe engine
gclient: fix patch_project handling for the recipe engine

This is needed after https://github.com/luci/recipes-py/commit/d88f0c8311fdf2fe2d258d1032f84a251ceba83f

BUG=none

Review-Url: https://codereview.chromium.org/2091313003

primiano/depot_tools,primiano/depot_tools,CoherentLabs/depot_tools,CoherentLabs/depot_tools,primiano/depot_tools