compile fix gcc-6
https://bugs.gentoo.org/show_bug.cgi?id=593854
Signed-of-by: Joerg Bornkessel <hd_brummy@gentoo.org> (2016/Oct/16)
diff -Naur vompserver-0.4.1.orig/Makefile vompserver-0.4.1/Makefile
--- vompserver-0.4.1.orig/Makefile	2016-10-16 23:48:36.100111158 +0200
+++ vompserver-0.4.1/Makefile	2016-10-16 23:49:05.226111158 +0200
@@ -53,7 +53,7 @@
 
 INCLUDES +=
 
-DEFINES += -DPLUGIN_NAME_I18N='"$(PLUGIN)"'
+DEFINES += -DPLUGIN_NAME_I18N='"$(PLUGIN)"' -D__STL_CONFIG_H
 
 # VOMP-INSERT
 DEFINES += -DVOMPSERVER