patch_manager_unittest: rename variables to be more meaningful

BUG=chromium:1042953

TEST=verified locally.

Change-Id: I1a452c2756491e69121a161a32ab007c4e79629d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/2006728
Reviewed-by: George Burgess <gbiv@chromium.org>
Tested-by: Jian Cai <jiancai@google.com>
1 file changed