Bootstrapping steps:
  1. Modify env.sh to accept the uname output.
  1. Modify header.kmk to accept and correctly configure the platform / target OS.
  1. If GNU Make v3.81 or later isn't availble, build plain make:
      1. Run aclocal, autoconf and automake in src/gmake if needed.
      1. Create and enter src/gmake/obj.
      1. Run ../configure.
      1. Run make
      1. We've now got our own make binary which will be used in the next step.
  1. Build kBuild using GNU Make:
      1. Run kBuild/env.sh to configure the environment properly.
      1. Go to the root.
      1. make -f Makefile.kmk
      1. Copy out/$BUILD_TARGET.$BUILD_TARGET_ARCH/debug/kBuild/bin/$BUILD_TARGET_ARCH.$BUILD_TARGET/ to kBuild/bin/$BUILD_TARGET_ARCH.$BUILD_TARGET/.
   1. Build a release build using kmk (which should now be in the path):
      1. Run kBuild/env.sh (or continue in the shell from the previous step).
      1. Go to the root.
      1. kmk BUILD_TYPE=release
      1. Copy out/$BUILD_TARGET.$BUILD_TARGET_ARCH/release/kBuild/bin/$BUILD_TARGET_ARCH.$BUILD_TARGET/ to kBuild/bin/$BUILD_TARGET_ARCH.$BUILD_TARGET/.
   1. Add and commit the changes (including the binaries).