Update README ans tools scripts

Update README ans tools scripts

Signed-off-by: Bensuperpc <bensuperpc@gmail.com>

tools/dockcross-make-builder.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+if (( $# >= 1 )); then
+    image=$1
+    build_file=build-${image%:*}
+    shift 1
+
+    make_arg=$*
+    echo "make arg: $make_arg"
+
+    #echo "Pulling dockcross/$image"
+    #docker pull dockcross/"$image"
+
+    echo "Make script dockcross-$image"
+    docker run --rm dockcross/"$image" > ./dockcross-"$image"
+    chmod +x ./dockcross-"$image"
+
+    echo "Build $build_file"
+    ./dockcross-"$image" bash -c 'make CXX=${CXX} CC=${CC} AR=${AR} AS=${AS} LD=${LD} CPP=${CPP} FC=${FC} '"$make_arg"
+else
+    echo "Usage: ${0##*/} <docker imag (ex: linux-x64/linux-x64-clang/linux-arm64/windows-shared-x64/windows-static-x64...)> <make arg.>"
+    exit 1
+fi