python: Port the python2.4 patches to 2.7

Signed-off-by: Maxime Ripard <ripard@archos.com>

package/python/python-2.7-020-gentoo_py_dontcompile.patch

@@ -0,0 +1,27 @@
+This patch purpose is to allow not to save the generated python bytecode in
+a file for later use through the PYTHON_DONTCOMPILE environment variable.
+
+I do not see the use of it, because you can choose if you want but it seems
+somewhat related to gentoo.
+
+Maybe useful when the generated rootfs is mounted on read-only on the target.
+
+Patch ported to python2.7 by Maxime Ripard <ripard@archos.com>
+
+diff -rduNp Python-2.7.orig/Python/import.c Python-2.7/Python/import.c
+--- Python-2.7.orig/Python/import.c	2010-09-30 12:05:53.000000000 +0200
++++ Python-2.7/Python/import.c	2010-09-30 12:20:38.000000000 +0200
+@@ -886,7 +886,12 @@ write_compiled_module(PyCodeObject *co,
+     mode_t mode = srcstat->st_mode & ~S_IXUSR & ~S_IXGRP & ~S_IXOTH;
+ #endif
+ 
+-    fp = open_exclusive(cpathname, mode);
++    char *py_dontcompile = getenv("PYTHON_DONTCOMPILE");
++
++    if (!py_dontcompile)
++      fp = open_exclusive(cpathname, mode);
++    else
++      fp = NULL;
+     if (fp == NULL) {
+         if (Py_VerboseFlag)
+             PySys_WriteStderr(