Fix for jumbo base scripts, don't double filter sources

If someone has managed to get a normally filtered file into
sources we need to not accidentally remove it again. This
problem triggered in net where android targets wanted to use
Linux files.

Bug: 772146
Change-Id: Ibca410c78c5a59e9f49c1d0e302204b598df25ca
Reviewed-on: https://chromium-review.googlesource.com/703694
Reviewed-by: Bruce Dawson <brucedawson@chromium.org>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#507004}
1 file changed