Change gdb.

Author: perlfu

tools/bootImageRunner/rvm.classpath

@@ -63,4 +63,4 @@ fi
 echo "break sysCreateThreadSpecificDataKeys" >> $TMP_GDB_COMMANDS
 echo "set pagination no" >> $TMP_GDB_COMMANDS
 
-gdb "${gdb_args[@]}" "$RVM_HOME/JikesRVM" "--command=$TMP_GDB_COMMANDS"
+fsf-gdb "${gdb_args[@]}" "$RVM_HOME/JikesRVM" "--command=$TMP_GDB_COMMANDS"