Fix yasm_assemble.gni

Change #294679 was lost in #294932

BUG=None

Review URL: https://codereview.chromium.org/583753002

Cr-Original-Commit-Position: refs/heads/master@{#295567}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 1edae36d2b9bbf4010fa3cc387e588132197361b
1 file changed