classes/[gnome|gnomebase|mime]: enhance gnome related classes

This patch pulls in the gnome related classes from oe-core which
adds extra packaging rules and functionality whilst modularising things
so that one can get a subset of gnome functionality without adding a lot
of extra dependencies.

These aren't an exact copy of the classes from meta-openembedded, notable
differences are:
* gnome.bbclass - I dropped the BBCLASSEXTEND
* mime.bbclass:
  - updated coding style
  - use which to find update-mime-database program rather than hard coded
  - fix typo in populate_packges_append such that it's actually called

CC: Koen Kooi <koen@dominion.thruhere.net>
CC: Richard Purdie <richard.purdie@linuxfoundation.org>
(From OE-Core rev: 6ead00eba265211eae5a2423c155403c8c6d54d0)

Signed-off-by: Joshua Lock <josh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/gnome.bbclass

@@ -1,17 +1,3 @@
-def gnome_verdir(v):
-	import re
-	m = re.match("^([0-9]+)\.([0-9]+)", v)
-	return "%s.%s" % (m.group(1), m.group(2))
+inherit gnomebase gtk-icon-cache gconf mime
 
-SECTION ?= "x11/gnome"
-SRC_URI = "${GNOME_MIRROR}/${BPN}/${@gnome_verdir("${PV}")}/${BPN}-${PV}.tar.bz2;name=archive"
-
-DEPENDS += "gnome-common"
-
-FILES_${PN} += "${datadir}/application-registry \
-    ${datadir}/mime-info \
-    ${datadir}/gnome-2.0"
-
-inherit autotools pkgconfig gconf
-
-EXTRA_OEMAKE += "GCONF_DISABLE_MAKEFILE_SCHEMA_INSTALL=1"
+EXTRA_OECONF += "--enable-introspection=no"