Update mman-win32.mk

Rather than always downloading the latest commit, this will cause it to download a specific commit.

src/mman-win32.mk

@@ -3,11 +3,11 @@
 
 PKG             := mman-win32
 $(PKG)_IGNORE   :=
-$(PKG)_VERSION  := 378ed6b69bb7220511dd9cd0973c22b3f6773ce7
-$(PKG)_CHECKSUM := f2e54393f530b35d1736fa98a5a29d7d3a0ce76b
+$(PKG)_VERSION  := 3421c28e753c38d24a2e27c111b1c9b4601ebe7d
+$(PKG)_CHECKSUM := c33e84043d49d0e33bc434bda3a16ce60432e789
 $(PKG)_SUBDIR   := mman-win32-master
 $(PKG)_FILE     := mman-win32-$($(PKG)_VERSION).tar.gz
-$(PKG)_URL      := https://github.com/witwall/mman-win32/archive/master.tar.gz
+$(PKG)_URL      := https://github.com/witwall/mman-win32/archive/3421c28e753c38d24a2e27c111b1c9b4601ebe7d.zip
 $(PKG)_DEPS     := gcc
 
 define $(PKG)_UPDATE