KDE4 on OpenBSD: CMake

• No parallelism with make:

• GNU Make uses complicated mechanism for inter operating between make(1) instances
• First try: add .CHEAP and .EXPENSIVE to generated Makefiles (by yours truly)
• Second try: switch to Ninja (by dcoppa@)
• better parallel builds implementation and general speedup for CMake-based ports
• doesn't support languages except C/C++