Enhance GN string interpolation.

This allows writing scope accesses ${invoker.foo} and list accesses
${sources[0]} inside bracketed string interpolation.

Review URL: https://codereview.chromium.org/1268973003

Cr-Original-Commit-Position: refs/heads/master@{#341547}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: f87ebd5381d93ab4540d66a525e6e1d058bd8f2b
3 files changed
tree: 84f52c336c16f9c309eb322adcf30b68ad90226a
  1. tools/