python: update to 2.7.15

Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>

src/patches/python-2.7.13-getentropy.patch

@@ -1,22 +0,0 @@
-diff --git a/Python/random.c b/Python/random.c
-index 2f83b5d..4cae217 100644
---- a/Python/random.c
-+++ b/Python/random.c
-@@ -97,8 +97,15 @@ win32_urandom(unsigned char *buffer, Py_ssize_t size, int raise)
- }
- 
- /* Issue #25003: Don't use getentropy() on Solaris (available since
-- * Solaris 11.3), it is blocking whereas os.urandom() should not block. */
--#elif defined(HAVE_GETENTROPY) && !defined(sun)
-+   Solaris 11.3), it is blocking whereas os.urandom() should not block.
-+
-+   Issue #29188: Don't use getentropy() on Linux since the glibc 2.24
-+   implements it with the getrandom() syscall which can fail with ENOSYS,
-+   and this error is not supported in py_getentropy() and getrandom() is called
-+   with flags=0 which blocks until system urandom is initialized, which is not
-+   the desired behaviour to seed the Python hash secret nor for os.urandom():
-+   see the PEP 524 which was only implemented in Python 3.6. */
-+#elif defined(HAVE_GETENTROPY) && !defined(sun) && !defined(linux)
- #define PY_GETENTROPY 1
- 
- /* Fill buffer with size pseudo-random bytes generated by getentropy().