add (missing) tar to list of packages to get under mingw

cthulhua · cthulhua · commit 2ebef83f5296 · 2016-10-13T19:38:49.000-07:00
diff --git a/README.md b/README.md
@@ -89,6 +89,7 @@ build.
    $ pacman -S git \
                make \
                diffutils \
+               tar \
                mingw-w64-x86_64-python2 \
                mingw-w64-x86_64-cmake \
                mingw-w64-x86_64-gcc
