Add setup commands for Mac

Development/Scripts/Mac/CallBuildTool.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+# Copyright (c) 2012-2021 Wojciech Figat. All rights reserved
+
+set -e
+
+testfilesize=$(wc -c < 'Source/Logo.png')
+if [ $testfilesize -le 1000 ]; then
+    echo "CallBuildTool ERROR: Repository was not cloned using Git LFS" 1>&2
+	exit 1
+fi
+
+# Compile the build tool.
+xbuild /nologo /verbosity:quiet "Source/Tools/Flax.Build/Flax.Build.csproj" /property:Configuration=Release /property:Platform=AnyCPU /target:Build
+
+# Run the build tool using the provided arguments.
+#mono --debug --debugger-agent=transport=dt_socket,server=y,address=127.0.0.1:55555 Binaries/Tools/Flax.Build.exe "$@"
+mono Binaries/Tools/Flax.Build.exe "$@"