python: Don't use getentropy on Linux

Backport a patch from 2.7 branch to fix a regression with glibc
2.24 causing "OSError: [Errno 38] Function not implemented" when
calling urandom() with older kernels.

(From OE-Core rev: 3f2be1c857a44030478ce25b4a722667b73de446)

Signed-off-by: Andreas Oberritter <obi@opendreambox.org>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/python/python_2.7.12.bb

@@ -27,6 +27,7 @@ SRC_URI += "\
   file://use_sysroot_ncurses_instead_of_host.patch \
   file://add-CROSSPYTHONPATH-for-PYTHON_FOR_BUILD.patch \
   file://python-fix-CVE-2016-1000110.patch \
+  file://Don-t-use-getentropy-on-Linux.patch \
 "
 
 S = "${WORKDIR}/Python-${PV}"