use perl_gen_filelist to avoid packaging the "auto" directory

this leads to build errors in SLE_11 repo
%perl_gen_filelist tries to package everything, remove all non-perl files from list to avoid duplicate files

OBS-URL: https://build.opensuse.org/package/show/Virtualization/libguestfs?expand=0&rev=78

libguestfs.spec

@@ -366,6 +366,11 @@ make \
 %install
 %makeinstall
 %perl_process_packlist
+%perl_gen_filelist
+# the macro above packages everything, here only the perl files are desrired
+grep "%perl_vendorarch/" %{name}.files | tee t
+mv t %{name}.files
+#
 rm -f $RPM_BUILD_ROOT/%{_libdir}/*.{l,}a
 touch %{name}.lang
 %find_lang %{name}
@@ -577,9 +582,8 @@ rm -rf $RPM_BUILD_ROOT
 
 %postun -n perl-Sys-Guestfs -p /sbin/ldconfig
 
-%files -n perl-Sys-Guestfs
+%files -n perl-Sys-Guestfs -f %{name}.files
 %defattr(-,root,root)
-%perl_vendorarch/*
 %endif
 #
 %if %{with_python}