knxd: new version, force gcc instead of g++, simplify package structure

Signed-off-by: Othmar Truniger <github@truniger.ch>

net/knxd/patches/0100-musl-compat

@@ -1,10 +0,0 @@
---- a/src/examples/common.h	2015-06-27 15:20:15.266563893 +0200
-+++ b/src/examples/common.h	2015-06-27 15:23:09.406457392 +0200
-@@ -20,6 +20,7 @@
- #include <stdlib.h>
- #include <errno.h>
- #include <unistd.h>
-+#include <sys/select.h>
- #include "eibclient.h"
- 
- /** unsigned char*/