w6l: size -L/-l/input arrays by argc, not a fixed 64 (F-C)

libdirs, lflags and inputs were fixed 64-slot arrays written with no
bound check; the 65th -L/-l flag (or input) wrote past the allocation
-> heap corruption. Size all three by argc instead, the true upper
bound since each argv slot yields at most one entry, mirroring cstage
cmd/w6l/main.c:63-67 (calloc(argc, ...)). Drop the now-dead maxinputs
"too many inputs" cap -- cstage has none, and argc-sizing makes it
unreachable.

Regenerates the w6l combined.ww. Table-driven 632 test reaches a lib
only via the Nth -L (N in {1,64,65,100,128}, both stages); pre-fix the
nflags=65 row fails (slot one past the 64-array).

Makefile

@@ -233,6 +233,7 @@ TESTS	= $(BIN)/test_smoke $(BIN)/test_lex $(BIN)/test_parse $(BIN)/test_check \
 	  $(BIN)/test_w6c $(BIN)/test_w6a $(BIN)/test_w6a_parsenum \
 	  $(BIN)/test_dataw $(BIN)/test_datar \
 	  $(BIN)/test_w6l $(BIN)/test_data_link \
+	  $(BIN)/test_w6l_manyflags \
 	  $(BIN)/test_arch \
 	  $(BIN)/test_e2e $(BIN)/test_ffi $(BIN)/test_dyn $(BIN)/test_stdlib \
 	  $(BIN)/test_at_test $(BIN)/test_selfimport $(BIN)/test_missingpkg \
@@ -638,6 +639,10 @@ $(BIN)/test_datar: test/wcc/520_datar.c $(BIN)/w6a $(BIN)/w6l | $(BIN)
 $(BIN)/test_w6l: test/wcc/600_w6l.c $(BIN)/w6c $(BIN)/w6a $(BIN)/w6l | $(BIN)
 	$(CC) $(CFLAGS) -o $@ $<
 
+$(BIN)/test_w6l_manyflags: test/wcc/632_w6l_manyflags.c $(BIN)/w6c $(BIN)/w6a \
+		$(BIN)/w6l $(BIN)/w6l_ww | $(BIN)
+	$(CC) $(CFLAGS) -o $@ $<
+
 $(BIN)/test_data_link: test/wcc/620_data_link.c $(BIN)/w6a $(BIN)/w6l | $(BIN)
 	$(CC) $(CFLAGS) -o $@ $<