lfs: separate zip name from folder name

Git LFS sometimes packages the .exe files in subdirectories, sometimes
not. Let's separate the name of the .zip file from the folder name so
that we can adjust one without the other.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

mingw-w64-git-lfs/PKGBUILD

@@ -15,16 +15,18 @@ groups=('VCS')
 
 case "$CARCH" in
 i686)
+  zipname="git-lfs-windows-386-$pkgver.zip"
   folder="git-lfs-windows-386-$pkgver"
   sha256sum=897571c2b8aa777d011e7c5496735e9dcb2da809faa741b113169a5cb04650bd
   ;;
 x86_64)
+  zipname="git-lfs-windows-amd64-$pkgver.zip"
   folder="git-lfs-windows-amd64-$pkgver"
   sha256sum=0866259d6b097f8ff379326f798a93034b61952382011671b80ecf4cc733de57
   ;;
 esac
 
-source=("https://github.com/github/git-lfs/releases/download/v$pkgver/$folder.zip"
+source=("https://github.com/github/git-lfs/releases/download/v$pkgver/$zipname"
 	"$src_zip_url")
 
 # Git LFS' source .zip now contains symbolic links that bsdtar does not like...