chore(presubmit): Rename remote to avoid conflict.

Closes #1214

Author: jbdeboer

scripts/travis/presubmit.sh

@@ -24,13 +24,13 @@ if [ "$TRAVIS_REPO_SLUG" = "angular/angular.dart" ]; then
     git config user.name "[email protected]"
 
     echo "Pushing HEAD to master..."
-    git remote add upstream https://github.com/angular/angular.dart.git
+    git remote add upstream-commit https://github.com/angular/angular.dart.git
     git stash
-    git fetch upstream master
-    git rebase upstream/master
-    if git push upstream HEAD:master; then
+    git fetch upstream-commit master
+    git rebase upstream-commit/master
+    if git push upstream-commit HEAD:master; then
       echo "$TRAVIS_BRANCH has been merged into master, deleting..."
-      git push upstream :"$TRAVIS_BRANCH"
+      git push upstream-commit :"$TRAVIS_BRANCH"
     fi
   fi
 fi