apply a workaround for broken tarball attributes in Net-DHCP distribution

perl-net/perl-net.spec

@@ -65,7 +65,7 @@ Class:        BASE
 Group:        Perl
 License:      GPL/Artistic
 Version:      %{V_perl}
-Release:      20070827
+Release:      20070829
 
 #   package options
 %option       with_pcap   no
@@ -336,7 +336,9 @@ AutoReqProv:  no
     %setup -q -T -D -a 25
     %setup -q -T -D -a 26
     %setup -q -T -D -a 27
+    (
     %setup -q -T -D -a 28
+    ) || true
     sed <%{PATCH0} -e 's;@l_prefix@;%{l_prefix};g' | %{l_patch} -p0 -b
 
 %build