bitbake: doc/lib: Update to use new override syntax containing colons

This runs the overrides conversion script in OE-Core over the bitbake code
base including the docs. A handful of things were excluded in toaster
and for the Changelog file.

(Bitbake rev: 47f8d3b24fd52381bf3b41e2f55a53e57841344c)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/contrib/vim/plugin/newbbappend.vim

@@ -20,7 +20,7 @@ fun! NewBBAppendTemplate()
     set nopaste
 
     " New bbappend template
-    0 put ='FILESEXTRAPATHS_prepend := \"${THISDIR}/${PN}:\"'
+    0 put ='FILESEXTRAPATHS:prepend := \"${THISDIR}/${PN}:\"'
     2
 
     if paste == 1