common: define json_boolean when not defined

Older versions of jansson in current use don't have this
macro defined.

src/suricata-common.h

@@ -219,6 +219,10 @@
 #ifndef JSON_ESCAPE_SLASH
 #define JSON_ESCAPE_SLASH 0
 #endif
+/* Appears not all current distros have jansson that defines this. */
+#ifndef json_boolean
+#define json_boolean(val)      ((val) ? json_true() : json_false())
+#endif
 #endif
 
 #if CPPCHECK==1