WiX: include llvm-ml in the build tools

The Windows build tools should include `llvm-ml`, a replacement for `ml`
which is the assembler.

Author: compnerd

platforms/Windows/bld/bld.wxs

@@ -100,6 +100,9 @@
       <Component>
         <File Source="$(TOOLCHAIN_ROOT)\usr\bin\llvm-lipo.exe" />
       </Component>
+      <Component>
+        <File Source="$(TOOLCHAIN_ROOT)\usr\bin\llvm-ml.exe" />
+      </Component>
       <Component>
         <File Source="$(TOOLCHAIN_ROOT)\usr\bin\llvm-mt.exe" />
       </Component>