setuptools.msvc: set host_dir correctly on ARM64 hosts

Author: swt2c

setuptools/msvc.py

@@ -1038,9 +1038,13 @@ def VCTools(self):
             tools += [os.path.join(si.VCInstallDir, path)]
 
         elif self.vs_ver >= 15.0:
-            host_dir = (
-                r'bin\HostX86%s' if self.pi.current_is_x86() else r'bin\HostX64%s'
-            )
+            if self.pi.current_is_x86():
+                host_dir = r'bin\HostX86%s'
+            elif self.pi.current_cpu == 'arm64':
+                host_dir = r'bin\HostARM64%s'
+            else:
+                host_dir = r'bin\HostX64%s'
+
             tools += [
                 os.path.join(si.VCInstallDir, host_dir % self.pi.target_dir(x64=True))
             ]