python3-native: Avoid use of getentropy/getrandom

getentropy/random() is only available in glibc 2.25+ and uninative may relocate
binaries onto systems that don't have this function. For now, force the code to
the older codepaths until we can come up with a better solution for this kind of
issue.

(From OE-Core rev: 92bda0024d85ae78345665cc2f9646c9881ed61b)

(From OE-Core rev: 2dc6ee0c520442418fa14cf3fe12b059209e9ab7)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/python/python3-native_3.5.2.bb

@@ -65,7 +65,8 @@ RPROVIDES += " \
     python3-unittest-native \
 "
 
-EXTRA_OECONF_append = " --bindir=${bindir}/${PN} --without-ensurepip"
+# uninative may be used on pre glibc 2.25 systems which don't have getentropy
+EXTRA_OECONF_append = " --bindir=${bindir}/${PN} --without-ensurepip ac_cv_func_getentropy=no"
 
 EXTRA_OEMAKE = '\
   LIBC="" \
@@ -80,6 +81,7 @@ PYTHONLSBOPTS = ""
 
 do_configure_append() {
 	autoreconf --verbose --install --force --exclude=autopoint ../Python-${PV}/Modules/_ctypes/libffi
+	sed -i -e 's,#define HAVE_GETRANDOM 1,/\* #undef HAVE_GETRANDOM \*/,' ${B}/pyconfig.h
 }
 
 do_install() {