gstreamer1.0-plugins-bad: Remove gles2 for i.MX6 SoloLite

i.MX6 SoloLite (mx6sl) does not support 3D GPU hardware
acceleration. The X11 backend only supports mesa software rendering GL
and non-x11 backends does not support both GL and GLES.

This patch defines PACKAGECONFIG_GL for each i.MX6 SoC family as i.MX6
SoloLite is different from other SoC's.

Signed-off-by: Neena Busireddy <neena.busireddy@freescale.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
cairo: Fix PACKAGECONFIG settings

Remove a forced setting of PACKAGECONFIG_mx6 - this caused some flags
which were set by the main recipe to be lost, e.g. "x11".  The flags
which are being set by these lines are correctly set in the main recipe,
so this change fixes the errant behaviour with no other side effects.

Signed-off-by: Gary Thomas <gary@mlbassoc.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
nativesdk-packagegroup-sdk-host: add nativesdk-u-boot-mkimage

Add the 'mkimage' host tool to the toolchains generated with 'bitbake
meta-toolchain' or with 'bitbake -c populate_sdk <image>'.

This allows to use the standalone toolchain to build kernel images of
type uImage (with u-boot header)

Signed-off-by: Javier Viguera <javier.viguera@digi.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>