ww: preserve command package identities

cmd/wcc/ww.h

@@ -381,6 +381,8 @@ struct Parser {
 				 * component) instead of overwriting curmod. */
 	const char *testmodule;	/* hidden package-driver alias for toolchain
 				 * `package test`; NULL outside that compile */
+	int	commandpackage; /* selected command family: package main/main_test
+				 * validates kind without replacing resetmod identity */
 };
 
 void	parserinit(Parser*, Arena*, Lex*);