imx-gpu-viv: bump version to 5.0.11-p8.4

imx-gpu-viv: bump version to 5.0.11-p8.4

Changelog:
Software floating point is no longer supported.

For a detailed list of changes in this update, see the Graphics section of
the i.MX Linux Release Notes contained in the i.MX Linux BSP documentation
here:

https://www.nxp.com/webapp/Download?colCode=L4.1.15_1.1.0_LINUX_DOCS&location=null&fpsp=1&WT_TYPE=Supporting%20Information&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=gz&WT_ASSET=Documentation&fileExt=.gz&Parent_nodeId=1337637154535695831062&Parent_pageType=product

This patch is based on the Yocto equivalent:
https://github.com/Freescale/meta-fsl-arm/commit/b667ed4
https://github.com/Freescale/meta-fsl-arm/commit/af5b3a6

This package has been tested with both X11 and Framebuffer backends:
 # cd /usr/share/examples/viv_samples/vdk/
 # apitrace trace --api egl ./tutorial7
 # gmem_info
 ... display memory use per PID ...
 # apitrace replay tutorial7.trace
 # eglretrace tutorial7.trace

Signed-off-by: Andrew Webster <awebster@arcx.com>
Tested-by: Gary Bisson <gary.bisson@boundarydevices.com>
Reviewed-by: Gary Bisson <gary.bisson@boundarydevices.com>
[Thomas:
 - use only one comment for the glibc and ARM EABIhf dependency, like we
   do for the mali-t76x package.
 - reword the comment for the EABIhf dependency, as suggested by Gary
 - remove the IMX_GPU_VIV_BASE_VERSION variable, and use directly
   IMX_GPU_VIV_VERSION, as suggested by Gary.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>