Add toolchain directory to *.dll name generated by GN.

This allows to have the same shared library compiled by
multiple toolchains.

BUG= none
TEST= gn_unittest, create a copy of windows toolchain and
  add references to the same library compiled by normal
  and copied toolchain.

Review URL: https://codereview.chromium.org/144033002

Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: b839a402a9bd1506cad24beefa711ce83975a909
1 file changed
tree: 20963fa2b7638ef12d00989044f712b10fd16b74
  1. tools/