superproject: prepend messages with - "repo superproject"

Changed _LogError method to _LogWarning.

Replaced 'repo error:' with "repo superproject warning:"(except IOError
message, which is still an "repo superproject error:" message)

Tested:
$ ./run_tests

Tested the errors and warnings by forcing the error/warning.
$ repo_dev sync -j 20 --use-superproject platform/packages/apps/Music
  ...
  repo superproject warning: please file a bug using go/repo-bug to report missing commit_ids for: []
  ...
  repo superproject error: cannot write manifest to : /sdc/android/src/aosp/.repo/exp-superproject/superproject_override.xml
  ...

Bug: [google internal] b/193711236

Change-Id: Ia0b6c830e04cf18dfc1a2ce325181a5b1160e054
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/314642
Tested-by: Raman Tenneti <rtenneti@google.com>
Reviewed-by: Raman Tenneti <rtenneti@google.com>
Reviewed-by: Ian Kasprzak <iankaz@google.com>
Reviewed-by: Xin Li <delphij@google.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/fixtures/test.gitconfig b/tests/fixtures/test.gitconfig
index d71f8e73..d69e162c 100644
--- a/tests/fixtures/test.gitconfig
+++ b/tests/fixtures/test.gitconfig
@@ -12,10 +12,10 @@
         intm = 10m
         intg = 10g
 [repo "syncstate.main"]
-        synctime = 2021-07-29T22:07:43.463365Z
+        synctime = 2021-08-11T17:54:14.530286Z
         version = 1
 [repo "syncstate.sys"]
-        argv = ['/usr/bin/pytest-3']
+        argv = ['/usr/bin/pytest-3', '-v']
 [repo "syncstate.superproject"]
         test = false
 [repo "syncstate.options"]