Do not ship static library

There is no reason to use the static library. So do not ship it.
Do not even build it. If somebody proves me wrong, it can always been added
afterwards.

debian/libmuffin-dev.install

@@ -1,5 +1,4 @@
 usr/include
-usr/lib/*/lib*.a
 usr/lib/*/lib*.so
 usr/lib/*/pkgconfig/*.pc
 usr/lib/*/muffin/Meta-*.gir

debian/rules

@@ -10,6 +10,9 @@ export DEB_LDFLAGS_MAINT_APPEND=-Wl,--as-needed
 override_dh_autoreconf:
 	dh_autoreconf --as-needed
 
+override_dh_auto_configure:
+	dh_auto_configure -- --disable-static
+
 override_dh_shlibdeps:
 	dh_shlibdeps
 	dh_girepository /usr/lib/$(DEB_HOST_MULTIARCH)/muffin