Add basic presubmit hook config for frameworks/support.

Enables the following built in checks:
Check for "Bug: " in commit message
Check for "Test: " in commit message
Check for "ChangeId: " in commit message

Bug: 31494824
Test: Tested manually with a CL that was missing bug and test lines.
Change-Id: Iff3aeb5e4aacd6a974a22ebf45d80bbf9239156b
diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
new file mode 100644
index 0000000..eb6f5b4
--- /dev/null
+++ b/PREUPLOAD.cfg
@@ -0,0 +1,4 @@
+[Builtin Hooks]
+commit_msg_bug_field = true
+commit_msg_changeid_field = true
+commit_msg_test_field = true