buildbot:

Use BF_NUMJOBS from user cinfigs rather than passing it as
command line argument.

build_files/buildbot/slave_compile.py

@@ -60,23 +60,12 @@ else:
     if builder.startswith('linux'):
         import shutil
 
-        cores = 1
-        if hasattr(os, 'sysconf'):
-            if 'SC_NPROCESSORS_ONLN' in os.sysconf_names:
-                cores = os.sysconf('SC_NPROCESSORS_ONLN')
-
-            if cores > 1:
-                # there're two chroot environments in one machine,
-                # so use only a half of power for better performance
-                cores = cores / 2
-
         # We're using the same rules as release builder, so tweak
         # build and install dirs
         build_dir = os.path.join('..', 'build', builder)
         install_dir = os.path.join('..', 'install', builder)
 
-        common_options = ['BF_NUMJOBS=' + str(cores + 1),
-            'BF_INSTALLDIR=' + install_dir]
+        common_options = ['BF_INSTALLDIR=' + install_dir]
 
         # Clean install directory so we'll be sure there's no
         if os.path.isdir(install_dir):