+ test build iguana for linux (added libsodium)

on ubuntu-like systems libsodium can be easily installed by
`sudo apt install libsodium-dev`, but we can make download and
compile it from sources in additional bash script.

iguana/m_notary_build

@@ -0,0 +1,8 @@
+#!/bin/bash
+cd secp256k1; ./m_unix; cd ..
+cd ../crypto777; ./m_LP; cd ../iguana
+#gcc -g -fno-aggressive-loop-optimizations -Wno-deprecated -c -O2 -DISNOTARYNODE=1 -DLIQUIDITY_PROVIDER=1 *.c ../basilisk/basilisk.c ../gecko/gecko.c ../datachain/datachain.c
+clang -g -Wno-deprecated -c -O2 -DISNOTARYNODE=1 -DLIQUIDITY_PROVIDER=1 *.c ../basilisk/basilisk.c ../gecko/gecko.c ../datachain/datachain.c
+#gcc -g -fno-aggressive-loop-optimizations -Wno-deprecated -c -DISNOTARYNODE=1 -DLIQUIDITY_PROVIDER=1  main.c iguana777.c iguana_bundles.c ../basilisk/basilisk.c
+clang -g  -Wno-deprecated -c -DISNOTARYNODE=1 -DLIQUIDITY_PROVIDER=1  main.c iguana777.c iguana_bundles.c ../basilisk/basilisk.c
+clang -g -o ../agents/iguana *.o ../agents/libcrypto777.a -lnanomsg -lcurl -lssl -lcrypto -lpthread -lz -lm -lsodium