rename/restructure build make files macros to use
cxx... for C++ compiler related items
cpp... for C/C++ precompiler defined macros
use bld_os and bld_cpu instead of environment variables BOOTSTRAP_OS and BOOTSTRAP_CPU
fix awk script for message source file processing of multiple items on one line
fix problems with pick macros, now is pick macro defined in minimal scope, after using is immediately undefined
replace project unique mkstr utility by C preprocessing and awk script