message: Limit number of parallel builds to nproc.
  Without such a limit, running the test_cortex_m_corstone_300 script via
  github actions results in the ubild failing.
  See for additional
  context.
diff: @@ -33,5 +33,5 @@ readable_run make -f tensorflow/lite/micro/tools/make/Makefile OPTIMIZED_KERNEL_
  # Avoid running tests in parallel.
  readable_run make -f tensorflow/lite/micro/tools/make/Makefile clean
  -readable_run make -j -f tensorflow/lite/micro/tools/make/Makefile OPTIMIZED_KERNEL_DIR=${OPTIMIZED_KERNEL_DIR} TARGET=${TARGET} TARGET_ARCH=${TARGET_ARCH} build
  +readable_run make -j$(nproc) -f tensorflow/lite/micro/tools/make/Makefile OPTIMIZED_KERNEL_DIR=${OPTIMIZED_KERNEL_DIR} TARGET=${TARGET} TARGET_ARCH=${TARGET_ARCH} build
  readable_run make -f tensorflow/lite/micro/tools/make/Makefile OPTIMIZED_KERNEL_DIR=${OPTIMIZED_KERNEL_DIR} TARGET=${TARGET} TARGET_ARCH=${TARGET_ARCH} test
  