make_dlls: Ignore generated import libraries from the top-level .gitignore.

[wine] / dlls / comdlg32 / .gitignore

/800.bmp
/cdrom.ico
/floppy.ico
/folder.ico
/folder2.ico
/fontpics.bmp
/hdisk.ico
/network.ico
/pd32_collate.ico
/pd32_landscape.ico
/pd32_nocollate.ico
/pd32_portrait.ico
/rsrc.res