Add sodium.sh

Signed-off-by: Adrien Gallouët <adrien@gallouet.fr>

sodium.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+file=LATEST.tar.gz
+url=https://download.libsodium.org/libsodium/releases
+
+[ -f "$file" ] || wget -q     "$url/$file" -O "$file"
+[ -f "$file" ] || curl -SsfLO "$url/$file"
+[ -f "$file" ] || {
+	echo "Couldn't download $url/$file"
+	exit 1
+}
+
+rm -rf libsodium-stable
+tar zxf "$file"
+cd libsodium-stable || exit 1
+
+./configure --enable-minimal --disable-dependency-tracking --enable-static --disable-shared
+make -j