mingw: Base docker container on Fedora 24.

mingw/Dockerfile

-FROM fedora:23
+FROM fedora:24
 MAINTAINER opus@xiph.org
 
 # Linux build.

mingw/Makefile

@@ -88,7 +88,7 @@ ssl_BUILD: $(ssl_DIR)
 # CROSS_COMPILE="i686-w64-mingw32-" ./Configure mingw no-asm no-shared --prefix=$PWD/mingw && make depend && make -j8 && make install
 
 # Package the binaries.
-DIST := opusfile-0.7rc-f22docker-win32
+DIST := opusfile-0.8-f24docker-win32
 package: $(DIST).zip
 
 $(DIST).zip: $(DIST)