python3: Fix .pyc file reproduciblility

Applies a patch to python that makes the pre-compiled .pyc files
generated during the build reproducible.

(From OE-Core rev: 148d54f91f43147f31b16a7c2cb1ade385832366)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/python/python3_3.7.3.bb

@@ -26,6 +26,7 @@ SRC_URI = "http://www.python.org/ftp/python/${PV}/Python-${PV}.tar.xz \
 	   file://0001-bpo-36852-proper-detection-of-mips-architecture-for-.patch \
 	   file://crosspythonpath.patch \
            file://reformat_sysconfig.py \
+           file://0001-Use-FLAG_REF-always-for-interned-strings.patch \
            "
 
 SRC_URI_append_class-native = " \