bb.pysh: fix writing pyshtables all over the place

(Bitbake rev: ff4753e362714a3c4c759c2fad8a9e5b8fe5bef5)

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

bitbake/lib/bb/pysh/pyshyacc.py

@@ -648,7 +648,10 @@ def p_error(p):
 try:
     import pyshtables
 except ImportError:
-    yacc.yacc(tabmodule = 'pyshtables')
+    outputdir = os.path.dirname(__file__)
+    if not os.access(outputdir, os.W_OK):
+        outputdir = ''
+    yacc.yacc(tabmodule = 'pyshtables', outputdir = outputdir, debug = 0)
 else:
     yacc.yacc(tabmodule = 'pysh.pyshtables', write_tables = 0, debug = 0)