Compress OpenCL kernel files using zlib for Android

Kernel files are embedded into the binary as the default option when
building which leads to binary size bloating.

Add `compress_kernels` option and utilize zlib for further compressing
the text kernel files and reduce the overall binary size. We use a
base64 encoding/decoding to ensure that the strings can be easily
embedded. This adds to the binary size but still the overall reduction
is significant.
Maximum compression level 9 is used.

Option is currently restricted to Android builds as android toolchain
provides a zlib library.

Initial experimentations indicate a binary size reduction of 50%

Resolves: COMPMID-4017

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: Iee81b8c00391b26a5f41642699692928a4d6bd6e
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4958
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Gian Marco Iodice <gianmarco.iodice@arm.com>

0 files changed, 0 insertions, 0 deletions