zip: in TestVCS, skip instead of failing after VCS error

The underlying package doesn't interact with VCS. The test just does
this to simulate what the go command does. A VCS failure indicates a
problem with the test environment, not with the code being tested.

Fixes golang/go#38466

Change-Id: I1c36f7c9c644b22e01fa073a5d8a58c9a3893145
Run-TryBot: Jay Conrod <>
TryBot-Result: Gobot Gobot <>
Reviewed-by: Bryan C. Mills <>
1 file changed