RTC auf true

Revision:
0:38ceb79fef03
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/features/lwipstack/.mbedignore	Wed Nov 28 15:10:15 2018 +0000
@@ -0,0 +1,7 @@
+lwip/doc/*
+lwip/test/*
+lwip/src/apps/*
+lwip/src/netif/lwip_slipif.c
+lwip/src/include/lwip/apps/*
+lwip/src/include/posix/*
+lwip-eth/*