Release 1.2.1 (2019-11-26)

Baseline: 11deef7

Cherry picks:

   + c76c3e5:
     Replace macOS CC path with relative path
   + 63332eb:
     Hardcode path to dirname on macOS
   + ceadf0a:
     Add tool executables (from FilesToRunProvider) to action inputs.
   + dbe63b0:
     Fix some of the bazel Windows tools code to work with GCC.

This release fixes a single regression:
- #10297: Bazel 1.2.0 does no longer run on macOS High Sierra.

It is the same code as Bazel 1.2.0, except that we rebuild the macOS release
binaries with Xcode 10.2.1 to make them backwards compatible with older macOS
versions again.

CHANGELOG.md

@@ -1,3 +1,27 @@
+## Release 1.2.1 (2019-11-26)
+
+```
+Baseline: 11deef7582dfeec7a04ee3f7236393d9b8027367
+
+Cherry picks:
+
+   + c76c3e539c73ecf6e96e3e098be7be59e17bf276:
+     Replace macOS CC path with relative path
+   + 63332eb556fadfe9edd0806add79942482adddef:
+     Hardcode path to dirname on macOS
+   + ceadf0a063cb97c32aced143d2447781d1dafc38:
+     Add tool executables (from FilesToRunProvider) to action inputs.
+   + dbe63b00954a25fa4405f7cbf273df78c16498dd:
+     Fix some of the bazel Windows tools code to work with GCC.
+```
+
+This release fixes a single regression:
+- #10297: Bazel 1.2.0 does no longer run on macOS High Sierra.
+
+It is the same code as Bazel 1.2.0, except that we rebuild the macOS release
+binaries with Xcode 10.2.1 to make them backwards compatible with older macOS
+versions again.
+
 ## Release 1.2.0 (2019-11-20)
 
 ```