Add more golden tests for wrapper paths

Especially for:
- calling the wrapper with absolute path
- calling the wrapper in a deep directory
- calling a symlinked wrapper

BUG=chromium:773875
TEST=unit test

Change-Id: Ib01562d6c40d8d2ae0c439081fc04625663dcd07
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/1752524
Tested-by: Tobias Bosch <tbosch@google.com>
Reviewed-by: George Burgess <gbiv@chromium.org>
11 files changed