avoid chmod in install.sh

sendmail/sendmail.spec

@@ -33,7 +33,7 @@ Distribution: OpenPKG [PLUS]
 Group:        Mail
 License:      BSD
 Version:      8.12.9
-Release:      20030605
+Release:      20030612
 
 #   package options
 %option       with_tls      no
@@ -97,6 +97,7 @@ Conflicts:    ssmtp, exim, postfix
       %{l_shtool} subst \
           -e 's;\$chown;true;g' \
           -e 's;chgrp;true;g' \
+          -e 's;chmod;true;g' \
           devtools/bin/install.sh
     )