Reapply fixes for Bug 476, missing make.exe and scpp.exe, Bug 1895
LET = LEave Test-frameworkfl: a cpp filelistfl (dir1)?let: main testframeworklet -f cpp_file_list -o log_dirlet --std-in -o log_dirlogdiff: print the changes between to log dirlogdiff log_dir_1 log_dir_2