testcases/kernel/Makefile: remove 'timer' from Android FILTER_OUT_DIRS

'timer' folder is removed in 0051eab232e7f777f435945b1aba8911f203d65b.
Remove it from FILTER_OUT_DIRS for Android

Signed-off-by: Yixin Zhang <yixin.zhang@intel.com>
Acked-by: Li Wang <liwang@redhat.com>
diff --git a/testcases/kernel/Makefile b/testcases/kernel/Makefile
index 1a6a79b..03ea253 100644
--- a/testcases/kernel/Makefile
+++ b/testcases/kernel/Makefile
@@ -63,7 +63,7 @@
 
 ifeq ($(ANDROID),1)
 FILTER_OUT_DIRS		+= containers controllers device-drivers fs io ipc mem \
-				sched security timers
+				sched security
 endif
 
 include $(top_srcdir)/include/mk/generic_trunk_target.mk