build: omit named test source operands

cmd/wcc/ww.h

@@ -218,6 +218,7 @@ struct Lex {
 
 void	lexinit(Lex*, Arena*, const char *file, const char *src, u64 len);
 Tok	lexnext(Lex*);
+int	lexheaderimport(Lex*, Tok*);
 const char *tokname(Tkind);	/* canonical spelling, e.g. "fn", "+=" */
 void	tokprint(FILE*, Tok);	/* one line, "%s:%d:%d: %s %q" */
 Tkind	kwlookup(const char *s, u64 n);	/* TK_NONE if not a keyword */
@@ -408,6 +409,8 @@ struct Parser {
 
 void	parserinit(Parser*, Arena*, Lex*);
 Node	*parsefile(Parser*);
+/* Package/import header only: stop before the first ordinary declaration. */
+Node	*parsepackageheader(Parser*);
 /* Imports-only N_FILE: module/pos identify the first package clause,
  * list holds N_USE declarations, and body holds package-clause markers. */
 Node	*parseimports(Parser*);