Revert "disable de sub-project wingw-dll for now... apparently a botched commit"

This reverts commit ef0a4c5e.

Sorry for the trouble, should be OK now.

external/prj/build.lst

@@ -3,7 +3,6 @@ el	external					usr1 - all el_mkout NULL
 el	external\glibc		nmake	-	all	el_glibc NULL
 el	external\gcc3_specific	nmake	-	all	el_gcc3 NULL
 el	external\mingwheaders		nmake	-	w	el_mingwheaders NULL
-# the required mingw-dll directory is not commited yet... disable for now
-#el	external\mingw-dlls		nmake	-	w	el_mingwdlls NULL
+el	external\mingw-dlls		nmake	-	w	el_mingwdlls NULL
 el	external\jawt		nmake	-	w	el_jawt NULL
 el	external\wine		nmake	-	w	el_wine NULL