Dropping -fforce-addr from gforth as gcc aliases to clang on the bots.
Dropping -fforce-addr from gforth as gcc aliases to clang on the bots.

Gforth's build uses the -fforce-addr option, which clang doesn't support.
Dropping this (as they've also dropped similary flags previously judging by the
change log).

BUG=None
TEST=None
TBR=binji@chromium.org

Review URL: https://codereview.chromium.org/481343004

git-svn-id: 84b3587ce119b778414dcb50e18b7479aacf4f1d@1565 7dad1e8b-422e-d2af-fbf5-8013b78bd812

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