The schemas should be listed in GLIB_SCHEMAS instead of in the plist so the
glib schema database can be updated on installed/removal of the package.
This updating is done by the GLIB_SCHEMAS macro.
Make shotwell not run glib-compile-schemas in the stagedir, this has no effect.
Additional this generates the share/glib-2.0/schemas/gschemas.compiled file.
This file is managed by the glib20 port. And has a changing checksum because
it recompiled every time a GLIB_SCHEMAS enabled port is installed or removed.
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