python: Fix failures of LSB python-runtime tests.

Fix failues of LSB python-runtime tests.
test_largefile: add "ac_cv_sizeof_off_t=8" option explicitly into configure options in order to enable "LFS".
test_codecs, test_re, test_unicode: "--with-wctype-functions" will cause these tests failed, so remove it for LSB.
test_builtin, test_getargs: "sitecustomize.py" cause default encoding changed from "ascii" into "utf8" and it will cause these tests failed, so remove this file for LSB.

Signed-off-by: Jingdong Lu<jingdong.lu@windriver.com>

meta/recipes-devtools/python/python.inc

@@ -22,4 +22,14 @@ EXTRA_OECONF = "\
   --enable-shared \
 "
 
+EXTRA_OECONF_poky-lsb = "\
+  --with-threads \
+  --with-pymalloc \
+  --with-cyclic-gc \
+  --without-cxx \
+  --with-signal-module \
+  --enable-shared \
+  ac_cv_sizeof_off_t=8 \
+"
+
 PARALLEL_MAKE = ""