tools/gdbinit: revert last commit

tools/gdbinit

@@ -15,8 +15,7 @@
 #
 # To set a breakpoint when starting gdb with option "-ex run",
 # here what you need to do:
-set breakpoint pending on
-break _starpu_bubble_partition_data_if_needed
+#set breakpoint pending on
 #break starpu_mpi.c:419
 
 define starpu-print-job