Update libmatenotify to v1.5.0
A little modification
Update libmatenotify.spec
Update libmatenotify.spec:
1. remove wrong "\"
2. remove useless BR: gobject-introspection-devel
3. remove useless BR: libtool
Merge pull request #11 from kingheaven/libmatenotify

Update libmatenotify to v1.5.0