dev-util/osc: bump to 0.172, drop old

Include a patch to disable compressing manpage with gzip at build
time.

Closes: https://bugs.gentoo.org/780960
Signed-off-by: Anna Vyalkova <cyber@sysrq.in>

dev-util/osc/files/osc-no-man-compression.patch

@@ -0,0 +1,31 @@
+--- a/setup.py
++++ b/setup.py
+@@ -3,7 +3,6 @@
+ from distutils.core import setup
+ import distutils.core
+ from distutils.command import build, install_data
+-import gzip
+ import os.path
+ import sys
+ 
+@@ -29,9 +28,9 @@
+     def build_man_page(self):
+         """
+         """
+-        man_path = os.path.join(self.build_base, 'osc.1.gz')
++        man_path = os.path.join(self.build_base, 'osc.1')
+         distutils.log.info('generating %s' % man_path)
+-        outfile = gzip.open(man_path, 'wt')
++        outfile = open(man_path, 'w')
+         osccli = commandline.Osc(stdout=outfile)
+         # FIXME: we cannot call the main method because osc expects an ~/.oscrc
+         # file (this would break builds in environments like the obs)
+@@ -100,7 +99,7 @@
+ 
+ data_files = []
+ if sys.platform[:3] != 'win':
+-    data_files.append((os.path.join('share', 'man', 'man1'), ['osc.1.gz']))
++    data_files.append((os.path.join('share', 'man', 'man1'), ['osc.1']))
+ 
+ with open("README") as fh:
+     long_description = fh.read()