Add msvc-build-launcher-arm64.cmd to use VS 2019 to compile arm binaries

Author: niyas-sait

msvc-build-launcher-arm64.cmd

@@ -0,0 +1,17 @@
+@echo off
+
+set PATH_OLD=%PATH%
+set PATH=C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build;%PATH_OLD%
+
+REM now for arm 64-bit
+REM Cross compile for arm64
+call VCVARSx86_arm64
+if "%ERRORLEVEL%"=="0" (
+  cl /D "GUI=0" /D "WIN32_LEAN_AND_MEAN" launcher.c /O2 /link /MACHINE:arm64 /SUBSYSTEM:CONSOLE /out:setuptools/cli-arm64.exe
+  cl /D "GUI=1" /D "WIN32_LEAN_AND_MEAN" launcher.c /O2 /link /MACHINE:arm64 /SUBSYSTEM:WINDOWS /out:setuptools/gui-arm64.exe
+) else (
+  echo Visual Studio 2019 with arm64 toolchain not installed
+)
+
+set PATH=%PATH_OLD%
+