gstreamer1.0-plugins-base_1.16.imx: rebase patches and fix recipe
Current implemetation of recipe has absolute path to patches from
oe-core, which breaks the build if initialization script from Freescale
is not used to bootstrap the environment. Moreover, several patches from
oe-core does not apply cleanly to the NXP tree and should be rebased.
This commit eliminates the hardcoded paths from recipes and collects
patches from oe-core in this layer. Two patches are also rebased to be
cleany applied to NXP source tree.
