This fixes the build of the main app, but the GNOME Shell extension
remains broken.
* gnu/packages/gnome-xyz.scm (gpaste): Update to 45.2.
[inputs]: Remove ‘mutter’.
[arguments]: In ‘fix-introspection-install-dir’, adjust typelib variable
name.
* gnu/packages/patches/gpaste-fix-paths.patch: Update.
Change-Id: Ia80bddf9bf0978cd7a51a399ca3bf8f425377a6f