[CMSIS-NN] This change reduced the code size of AOT test runner binary for CMSIS-NN flow.

Presently, integration tests for CMSIS-NN generate
binaries which includes all the CMSIS-NN kernels sources.
This fix introduces additional compilation and runtime
knobs to pick kernel sources for which TVM has generated
the code.

Change-Id: Id222ca0d32222882a7a9c6f47bafea281f578c43

Author: Ashutosh Parkhi

tests/python/relay/aot/corstone300.mk

@@ -42,7 +42,7 @@ ETHOSU_PATH=/opt/arm/ethosu
 DRIVER_PATH=${ETHOSU_PATH}/core_driver
 CMSIS_PATH=${ETHOSU_PATH}/cmsis
 PLATFORM_PATH=${ETHOSU_PATH}/core_platform/targets/corstone-300
-PKG_COMPILE_OPTS = -Wall -Ofast -Wno-incompatible-pointer-types -Wno-format -mcpu=${MCPU} -mthumb -mfloat-abi=${MFLOAT_ABI} -std=gnu99
+PKG_COMPILE_OPTS = -Wall -Ofast -Wno-incompatible-pointer-types -Wno-format -mcpu=${MCPU}${MCPU_FLAGS} -mthumb -mfloat-abi=${MFLOAT_ABI} -std=gnu99
 CMAKE = /opt/arm/cmake/bin/cmake
 CC = arm-none-eabi-gcc
 AR = arm-none-eabi-ar