Bug 782037 - Fix NameError with missing `depfinished` function when there is a makefile error. r=gps
Bug 874210 - Fix pymake stack depth issues when many targets and prerequisites are present. r=gps
Bug 935050 - Manually flush native command's stdout and stderr, multiprocessing exits via os._exit. r=gps
Bug 936196 - Explicitly include unistd.h for getpid() on XP_UNIX. r=BenWa