[entropy.spm] generate_package(): fix broken handling of hard-links

Since tar-1.24, tar supports hard links, same for python-2.6.6.
However, generate_package() was resetting the file type on the
tarinfo object, causing the extractor (either tar or python tarfile)
to handle the file like it was a 0-size one.
dev-vcs/git package was broken due to this and there are probably
others.

libraries/entropy/spm/plugins/interfaces/portage_plugin/__init__.py

@@ -804,8 +804,6 @@ class PortagePlugin(SpmPlugin):
             tarinfo = tar.gettarinfo(lpath, arcname)
 
             if stat.S_ISREG(exist.st_mode):
-                tarinfo.mode = stat.S_IMODE(exist.st_mode)
-                tarinfo.type = tarfile.REGTYPE
                 with open(path, "rb") as f:
                     tar.addfile(tarinfo, f)
             else: