python3: Add a fix for a make install race

Add a fix for reproducibility issues where pyc files for python-config.py
may not always be generated.

(From OE-Core rev: 917f800368c6d452670d3ccf74057afae98013b0)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit d1c3a87c48b598b6e5624d0affe8bd89320631bf)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/python/python3/makerace.patch

@@ -0,0 +1,23 @@
+libainstall installs python-config.py but the .pyc cache files are generated
+by the libinstall target. This means some builds may not generate the pyc files
+for python-config.py depending on the order things happen in. This means builds
+are not always reproducible.
+
+Add a dependency to avoid the race.
+
+Upstream-Status: Pending
+Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
+
+Index: Python-3.8.11/Makefile.pre.in
+===================================================================
+--- Python-3.8.11.orig/Makefile.pre.in
++++ Python-3.8.11/Makefile.pre.in
+@@ -1415,7 +1415,7 @@ LIBSUBDIRS=	tkinter tkinter/test tkinter
+ 		unittest unittest/test unittest/test/testmock \
+ 		venv venv/scripts venv/scripts/common venv/scripts/posix \
+ 		curses pydoc_data
+-libinstall:	build_all $(srcdir)/Modules/xxmodule.c
++libinstall:	build_all $(srcdir)/Modules/xxmodule.c libainstall
+ 	@for i in $(SCRIPTDIR) $(LIBDEST); \
+ 	do \
+ 		if test ! -d $(DESTDIR)$$i; then \

meta/recipes-devtools/python/python3_3.8.11.bb

@@ -33,6 +33,7 @@ SRC_URI = "http://www.python.org/ftp/python/${PV}/Python-${PV}.tar.xz \
            file://0001-configure.ac-fix-LIBPL.patch \
            file://0001-python3-Do-not-hardcode-lib-for-distutils.patch \
            file://0020-configure.ac-setup.py-do-not-add-a-curses-include-pa.patch \
+           file://makerace.patch \
            "
 
 SRC_URI_append_class-native = " \