Use __file__, not sys.argv[0]

(Bitbake rev: 97e92abe49663eee189c89c1dc91fe69891faf73)

Signed-off-by: Chris Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

bitbake/bin/bitbake

@@ -24,7 +24,7 @@
 
 import os
 import sys, logging
-sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(sys.argv[0])),
+sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(__file__)),
                                 'lib'))
 
 import optparse

bitbake/bin/bitdoc

@@ -20,7 +20,7 @@
 import optparse, os, sys
 
 # bitbake
-sys.path.append(os.path.join(os.path.dirname(os.path.dirname(sys.argv[0])), 'lib'))
+sys.path.append(os.path.join(os.path.dirname(os.path.dirname(__file__), 'lib'))
 import bb
 import bb.parse
 from   string import split, join