setup.py: add missing space after '-fPIC' for ARCHFLAGS

- Basically, if users want to set ARCHFLAGS, maybe run the
    ARCHFLAGS='-arch x86_64' python setup.py install
  but it will define of CFLAGS to
    CFLAGS=' -O2 -fPIC-arch x86_64'
  Needs one space after '-fPIC'

Signed-off-by: Koichi Shiraishi <[email protected]>

Author: zchee

setup.py

@@ -44,7 +44,7 @@ def build_libuv(self):
         if not re.search('-O\d', cur_cflags):
             cur_cflags += ' -O2'
 
-        env['CFLAGS'] = (cur_cflags + ' -fPIC' + env.get('ARCHFLAGS', ''))
+        env['CFLAGS'] = (cur_cflags + ' -fPIC ' + env.get('ARCHFLAGS', ''))
 
         j_flag = '-j{}'.format(os.cpu_count() or 1)