Fix error when running `gdk update`

When running reconfigure the task unlock-dependency-installers is required, but it incorrectly looks for the path to .gettext causing:

.gettext
make: .gettext: No such file or directory
make: *** [unlock-dependency-installers] Error 1

Closes #230 (closed)

.gitignore

@@ -50,6 +50,7 @@
 /.gitlab-bundle
 /.gitlab-npm
 /.gitlab-yarn
+/.gettext
 /gem/*.gem
 /gitlab-runner-config.toml
 /.gdk-install-root