UnitTest: lib: test_mem_block_get test added
UnitTest: lib: test_mem_block_get test added

Unit tests for new memory_block library sys_mem_blocks_get functionality

Signed-off-by: Marcin Szkudlinski <2c84ee38d6d890101459fb64812a3a38803e9b60@intel.com>

galak/zephyr,galak/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,finikorg/zephyr,finikorg/zephyr