lib: Major rewrite of the libfprint core and API

This is a rewrite of the core based on GObject and Gio. This commit
breaks the build in a lot of ways, but basic functionality will start
working again with the next commits.

libfprint/libfprint.ver

@@ -1,6 +1,9 @@
 LIBFPRINT_2.0.0 {
 global:
 	fp_*;
+
+	/* Needs to be public for the listing commands. */
+	fpi_get_driver_types;
 local:
 	*;
 };