kconfig: fix warnings on format

Fixes warnings like:
conf.c:79:3: warning: format not a string literal and no format arguments [-Wformat-security]
   printf(_("aborted!\n\n"));
   ^

Note: not all compilers show this warning.

Signed-off-by: Denis Osterland <Denis.Osterland@diehl.com>
Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Change-Id: Ib1d8837c2a9a9a2378f65f90b9c2f239a52818b2

Author: OsterlaD

scripts/kconfig/lkc.h

@@ -11,6 +11,8 @@
 #ifndef KBUILD_NO_NLS
 # include <libintl.h>
 #else
+# include <features.h>
+__attribute_format_arg__(1)
 static inline const char *gettext(const char *txt) { return txt; }
 static inline void textdomain(const char *domainname) {}
 static inline void bindtextdomain(const char *name, const char *dir) {}