[pkg] keep egg-info directory

so that pkg_resources can find the package when using a new-style cube

cubicweb-squareui.spec

@@ -36,9 +36,6 @@
 
 %install
 NO_SETUPTOOLS=1 %{__python} setup.py --quiet install --no-compile --prefix=%{_prefix} --root="$RPM_BUILD_ROOT"
-# remove generated .egg-info file
-rm -rf $RPM_BUILD_ROOT/usr/lib/python*
-
 
 %clean
 rm -rf $RPM_BUILD_ROOT
@@ -46,3 +43,4 @@
 %files
 %defattr(-, root, root)
 %{_prefix}/share/cubicweb*
+%{_prefix}/lib/python*