Bug 853977- increase RLIMIT_NOFILE's soft limit to 2048 in init.b2g.rc r=mwu
Bug 862097 - set RLIMIT_NOFILE of b2g/content processes to 4096 r=mwu a=tef+
Add --nice option to b2g-procrank
Add missing semicolon to b2g-procrank.
Use TARGET_EXTRA_GLOBAL_CFLAGS (adds cflags to gonk) for gecko as well.