create link.filelist at lib.a

`make static` tries to install .rb files but it's not necessary, so we
use `make {lib}.a`, but link.filelist generation phase was not updated

Author: kateinoigakukun

ext/js/depend

@@ -1,7 +1,7 @@
 link.filelist:
 	echo $(foreach obj,$(OBJS),$(abspath $(obj))) > $@
 
-static: link.filelist
+js.a: link.filelist
 
 bindgen/rb-js-abi-host.h bindgen/rb-js-abi-host.c &: bindgen/rb-js-abi-host.wit
 	@mkdir -p "$(@D)"

ext/witapi/depend

@@ -2,7 +2,7 @@ link.filelist:
 	echo $(foreach obj,$(OBJS),$(abspath $(obj))) > $@
 	echo -mexec-model=reactor >> $@
 
-static: link.filelist
+witapi.a: link.filelist
 
 bindgen/rb-abi-guest.h bindgen/rb-abi-guest.c &: bindgen/rb-abi-guest.wit
 	@mkdir -p "$(@D)"