Bug 40691: Use the branch name also for base-browser.

Initially we thought of not creating a branch for base-browser, but only
a tag. However, fixing trivial issues for the base-browser part needed
a rebase in this way, if they were needed to correct the nightly.
So, we decided to create a branch also for base-browser.

projects/firefox/config

@@ -69,8 +69,8 @@ targets:
       branding_directory: 'browser/branding/official'
 
   nightly:
-    git_hash: '[% c("var/project-name") %]-[% c("var/firefox_version") %]-[% c("var/browser_branch") %][% IF c("var/base-browser") %]-build1[% END %]'
-    tag_gpg_id: '[% c("var/base-browser") %]'
+    git_hash: '[% c("var/project-name") %]-[% c("var/firefox_version") %]-[% c("var/browser_branch") %]'
+    tag_gpg_id: 0
     var:
       branding_directory: 'browser/branding/nightly'