cogl: further improvements

cogl: further improvements

 * Removed unnecessary gtk-doc related depends/configure options (handled in
   gtk-doc class)
 * Moved more configure options into PACKAGECONFIG
 * Fixed typo in RDEPENDS of PACKAGECONFIG[gl] setup
 * Removed no longer needed DOLT-related configure fragment

(From OE-Core rev: 356e00b198608080495641270f4a1634ddc6ff85)

Signed-off-by: Tomas Frydrych <tomas@sleepfive.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>