feat: iOS builds

includes patches to
- randomx: https://github.com/tevador/RandomX/pull/294
- randomwow: https://git.wownero.com/wownero/RandomWOW/pulls/2

external/ios/config.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+export IOS_SCRIPTS_DIR="$(pwd)"
+export CW_ROOT="${IOS_SCRIPTS_DIR}"
+export EXTERNAL_DIR="${CW_ROOT}/build"
+export EXTERNAL_IOS_DIR="${EXTERNAL_DIR}/ios"
+export EXTERNAL_IOS_SOURCE_DIR="${EXTERNAL_IOS_DIR}/sources"
+export EXTERNAL_IOS_LIB_DIR="${EXTERNAL_IOS_DIR}/lib"
+export EXTERNAL_IOS_INCLUDE_DIR="${EXTERNAL_IOS_DIR}/include"
+
+mkdir -p "$EXTERNAL_IOS_LIB_DIR"
+mkdir -p "$EXTERNAL_IOS_INCLUDE_DIR"