kernel/drivertools.h: avoid maybe-uninitialized compile warnings · YosysHQ/yosys@3ae9ca7

pkg-config 0.29.2_3 is already installed and up-to-date. To reinstall 0.29.2_3, run: brew reinstall pkg-config

These files were overwritten during the `brew link` step:

HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK is set: not checking for outdated dependents or dependents with broken linkage!