Add vim support for highlighting GN target names

For GN files, let the target name stand out from the directory path to
the BUILD file. For example, a dependency that looks like
"//base/foo:bar" will color ':bar' distinctly from the rest of the
string (using the 'Special' highlighting group).

BUG=

Review-Url: https://codereview.chromium.org/2672573002
Cr-Original-Commit-Position: refs/heads/master@{#447670}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 809b8f0ca34beae53da551347d4281cb2da386c9
1 file changed
tree: 404ce9a0e91368dcab4e1492e7a0aa899cbeebf8
  1. tools/