fix realpath stuff (PR#46)

jdk-sun/jdk-sun.spec

@@ -137,11 +137,15 @@ Provides:     JDK
     #   activate binaries
     ( cd $RPM_BUILD_ROOT%{l_prefix}/bin
       for bin in appletviewer awt_robot extcheck idlj jar jarsigner java \
-          java-rmi.cgi javac javadoc javah javap jdb keytool native2ascii \
-          oldjava oldjavac oldjdb policytool realpath rmic rmid rmiregistry \
+          javac javadoc javah javap jdb keytool native2ascii \
+          oldjava oldjavac oldjdb policytool rmic rmid rmiregistry \
           serialver tnameserv; do
           ln -s ../libexec/jdk-sun/bin/$bin .
       done
+      ( echo "#!/bin/sh"
+        echo "exec %{l_prefix}/libexec/jdk-sun/bin/realpath \"\$@\""
+      ) >realpath
+      chmod 755 realpath
     )
 
     #   install run-command script