diffstat: Add version 1.63

[Description](https://invisible-island.net/diffstat/):

> diffstat reads the output of diff and displays a histogram of the
> insertions, deletions, and modifications per-file. It is useful for
> reviewing large, complex patch files.

Needed for [Yocto](https://www.yoctoproject.org/).

diffstat.be0

@@ -0,0 +1,37 @@
+#!/usr/bin/env beesh
+
+# BEE_VERSION diffstat-1.63-0
+
+# more info: https://foo.bar.com
+
+SRCURL[0]="ftp://ftp.invisible-island.net/diffstat/diffstat-1.63.tgz"
+
+# PATCHURL+=()
+
+# build_in_sourcedir
+
+# sourcesubdir_append src
+
+#mee_extract() {
+#    bee_extract "${@}"
+#}
+
+#mee_patch() {
+#    bee_patch "${@}"
+#}
+
+#mee_configure() {
+#    bee_configure
+#}
+
+#mee_build() {
+#    bee_build
+#}
+
+#mee_install() {
+#    bee_install
+#}
+
+#mee_install_post() {
+#    exit
+#}