tracing: Fix SKIP_STACK_VALIDATION=1 build due to bad merge with -mrecord-mcount

Non gcc-5 builds with CONFIG_STACK_VALIDATION=y and
SKIP_STACK_VALIDATION=1 fail.
Example output:
  /bin/sh: init/.tmp_main.o: Permission denied

commit 96f60dfa ("trace: Use -mcount-record for dynamic ftrace"),
added a mismatched endif.  This causes cmd_objtool to get mistakenly
set.

Relocate endif to balance the newly added -record-mcount check.

Link: http://lkml.kernel.org/r/20180608214746.136554-1-gthelen@google.com

Fixes: 96f60dfa ("trace: Use -mcount-record for dynamic ftrace")
Acked-by: NAndi Kleen <ak@linux.intel.com>
Tested-by: NDavid Rientjes <rientjes@google.com>
Signed-off-by: NGreg Thelen <gthelen@google.com>
Signed-off-by: NSteven Rostedt (VMware) <rostedt@goodmis.org>

scripts/Makefile.build

@@ -239,6 +239,7 @@ cmd_record_mcount =						\
 	     "$(CC_FLAGS_FTRACE)" ]; then			\
 		$(sub_cmd_record_mcount)			\
 	fi;
+endif # -record-mcount
 endif # CONFIG_FTRACE_MCOUNT_RECORD
 
 ifdef CONFIG_STACK_VALIDATION
@@ -263,7 +264,6 @@ ifneq ($(RETPOLINE_CFLAGS),)
   objtool_args += --retpoline
 endif
 endif
-endif
 
 
 ifdef CONFIG_MODVERSIONS