mingw: Drop fedora from dist version.

I think it's less confusing for most users to omit this. I added
it so I could distinguish the docker-hosted cross package from
others, but it's a distraction for people trying to use the
resulting binaries.

mingw/Makefile

@@ -89,7 +89,7 @@ ssl_BUILD: $(ssl_DIR)
 
 # Package the binaries.
 DIST_VERSION := $(shell git describe --dirty)
-DIST := opusfile-$(DIST_VERSION)-f25docker-win32
+DIST := opusfile-$(DIST_VERSION)-win32
 package: $(DIST).zip
 
 $(DIST).zip: $(DIST)