Fix bazel makefile on Windows

The `make -C bazel generate` command doesn't function properly on
Windows builders because Windows uses backslashes as the path separator.

Fortunately, adding quotes around the path is enough to concince
Windows to run the executable, allowing the `generate` target to
complete successfully, and doing so doesn't impact Linux builders.

Bug: skia:13366
Change-Id: I50c461635b70cc59cd6e79bf17a6945c80df1986
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/544756
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
1 file changed