[BuildBot] Uplift GPU RT version for Linux to 21.04.18912 (#3125)

Signed-off-by: bb-sycl <[email protected]>

Author: bb-sycl

buildbot/dependency.conf

@@ -4,8 +4,8 @@ ocl_cpu_rt_ver=2020.11.11.0.04
 # https://github.com/intel/llvm/releases/download/2020-WW45/win-oclcpuexp-2020.11.11.0.04_rel.zip
 ocl_cpu_rt_ver_win=2020.11.11.0.04
 # Same GPU driver supports Level Zero and OpenCL
-# https://github.com/intel/compute-runtime/releases/tag/21.03.18857
-ocl_gpu_rt_ver=21.03.18857
+# https://github.com/intel/compute-runtime/releases/tag/21.04.18912
+ocl_gpu_rt_ver=21.04.18912
 # Same GPU driver supports Level Zero and OpenCL
 # https://downloadmirror.intel.com/30066/a08/igfx_win10_100.9030.zip
 ocl_gpu_rt_ver_win=27.20.100.9030
@@ -30,7 +30,7 @@ ocloc_ver_win=27.20.100.8935
 [DRIVER VERSIONS]
 cpu_driver_lin=2020.11.11.0.04
 cpu_driver_win=2020.11.11.0.04
-gpu_driver_lin=21.03.18857
+gpu_driver_lin=21.04.18912
 gpu_driver_win=27.20.100.9030
 fpga_driver_lin=2020.11.11.0.04
 fpga_driver_win=2020.11.11.0.04