remove *printf warnings preventing wprobe to build on uml x86_64

SVN-Revision: 17287

package/wprobe/src/Makefile.inc

@@ -4,7 +4,7 @@ CC=gcc
 AR=ar
 RANLIB=ranlib
 
-WFLAGS = -Wall -Werror
+WFLAGS = -Wall -Werror -Wno-format
 CFLAGS?=-O2
 CPPFLAGS=
 LDFLAGS=