All: Update library SDL to 290309, c-ares to 290089, boost to 290191,

colladadom to 290229, curl to 290186, fontconfig to 290258, freetype to 290255,
google-mock/gmock/gtest to 290199, libpng to 290081, libxml2 to 290157,
llqtwebkit to 290262/250147 (to be fixed shortly), openssl to 290083,
pcre to 290150, zlib to 290080.  The freetype2 headers are now normalized
to what they would normally be on a unix-type system.  Libxml2 and
pcre are available on all platforms.  Libraries generally move in the
direction of static archives rather than shared libraries (e.g. openssl).
The llqtwebkit side is a step back from the more ambitious goal.  What
will be used (290262) will be a simple rebuild of the existing 4.7.1
library with updated package dependencies.  The bigger work will be in
the future.