python3: Use -fno-strict-aliasing

Building under Python 2 passes -fno-strict-aliasing to gcc. By default
under Python 3 it doesn't, so add it in setup.py.

Signed-off-by: Andy Grover <agrover@redhat.com>

Author: Andy Grover

setup.py

@@ -67,6 +67,7 @@ def _str2list(pkgstr, onlystr):
                 'python-ethtool/etherinfo_obj.c',
                 'python-ethtool/netlink.c',
                 'python-ethtool/netlink-address.c'],
+            extra_compile_args=['-fno-strict-aliasing'],
             include_dirs = libnl['include'],
             library_dirs = libnl['libdirs'],
             libraries = libnl['libs'],