libretro-mame2016: fix build with Python 3

Universal newline handling is default since Python 3 and the "U"
file mode has been deprecated and is finally removed now. Drop the
"U" flag to fix build with Python 3.11

Signed-off-by: Matthias Reichl <hias@horus.com>

packages/emulation/libretro-mame2016/patches/python3.patch

@@ -0,0 +1,69 @@
+diff -ru a/scripts/build/verinfo.py b/scripts/build/verinfo.py
+--- a/scripts/build/verinfo.py	2022-04-06 22:13:09.000000000 +0200
++++ b/scripts/build/verinfo.py	2022-11-12 01:58:14.560895085 +0100
+@@ -63,7 +63,7 @@
+ build, outfmt, srcfile, dstfile = parse_args()
+ 
+ try:
+-    fp = open(srcfile, 'rU')
++    fp = open(srcfile, 'r')
+ except IOError:
+     sys.stderr.write("Unable to open source file '%s'\n" % srcfile)
+     sys.exit(1)
+diff -ru a/src/devices/cpu/m6502/m6502make.py b/src/devices/cpu/m6502/m6502make.py
+--- a/src/devices/cpu/m6502/m6502make.py	2022-04-06 22:13:09.000000000 +0200
++++ b/src/devices/cpu/m6502/m6502make.py	2022-11-12 01:58:41.276911837 +0100
+@@ -18,7 +18,7 @@
+     opcodes = []
+     logging.info("load_opcodes: %s", fname)
+     try:
+-        f = open(fname, "rU")
++        f = open(fname, "r")
+     except Exception:
+         err = sys.exc_info()[1]
+         logging.error("cannot read opcodes file %s [%s]", fname, err)
+@@ -41,7 +41,7 @@
+     logging.info("load_disp: %s", fname)
+     states = []
+     try:
+-        f = open(fname, "rU")
++        f = open(fname, "r")
+     except Exception:
+         err = sys.exc_info()[1]
+         logging.error("cannot read display file %s [%s]", fname, err)
+diff -ru a/src/devices/cpu/m6809/m6809make.py b/src/devices/cpu/m6809/m6809make.py
+--- a/src/devices/cpu/m6809/m6809make.py	2022-04-06 22:13:09.000000000 +0200
++++ b/src/devices/cpu/m6809/m6809make.py	2022-11-12 01:58:23.972900989 +0100
+@@ -16,7 +16,7 @@
+ 	if path != "":
+ 		path += '/'
+ 	try:
+-		f = open(fname, "rU")
++		f = open(fname, "r")
+ 	except Exception:
+ 		err = sys.exc_info()[1]
+ 		sys.stderr.write("Cannot read opcodes file %s [%s]\n" % (fname, err))
+diff -ru a/src/devices/cpu/mcs96/mcs96make.py b/src/devices/cpu/mcs96/mcs96make.py
+--- a/src/devices/cpu/mcs96/mcs96make.py	2022-04-06 22:13:09.000000000 +0200
++++ b/src/devices/cpu/mcs96/mcs96make.py	2022-11-12 01:59:08.144928680 +0100
+@@ -73,7 +73,7 @@
+         self.ea = {}
+         self.macros = {}
+         try:
+-            f = open(fname, "rU")
++            f = open(fname, "r")
+         except Exception:
+             err = sys.exc_info()[1]
+             sys.stderr.write("Cannot read opcodes file %s [%s]\n" % (fname, err))
+diff -ru a/src/devices/cpu/tms57002/tmsmake.py b/src/devices/cpu/tms57002/tmsmake.py
+--- a/src/devices/cpu/tms57002/tmsmake.py	2022-04-06 22:13:09.000000000 +0200
++++ b/src/devices/cpu/tms57002/tmsmake.py	2022-11-12 01:58:58.908922895 +0100
+@@ -323,7 +323,7 @@
+ def LoadLst(filename):
+     instructions = []
+     ins = None
+-    for n, line in enumerate(open(filename, "rU")):
++    for n, line in enumerate(open(filename, "r")):
+         line = line.rstrip()
+         if not line and ins:
+             # new lines separate intructions