Cherry pick [android_webview] Fix android_webview_resources dependency.

We need the android_webview_resources stamp file to be a dependency
of the R_file_stamp to force the resources to be generated before
we invoke AAPT on them.
LOCAL_ADDITIONAL_DEPENDENCIES was insufficient since that would
force generating the resources at a later stage.

BUG=393825
R=torne@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=286762

Bug: 16723226
Change-Id: Iadeac1b0fb80f49a1e30d3969184278ab441795e
2 files changed