Add define HXCPP_GENERATE_MSVC to make the hxcpp build tool output an MSVC solution/project

Author: hughsando

tools/hxcpp/BuildTool.hx

@@ -304,8 +304,20 @@ class BuildTool
       }
 
       Profile.setEntry("build");
-      for(target in inTargets)
-         buildTarget(target,destination);
+      if (mDefines.exists("HXCPP_GENERATE_MSVC"))
+      {
+         // Calculate platform string
+         var platform = m64 ? "x64" : (arm64 ? "ARM64" : "Win32");
+
+         var gen = new GenMsvc(mDefines, mTargets, mCompiler, platform, defaultCxxStandard);
+         for(target in inTargets)
+            gen.generate(target);
+      }
+      else
+      {
+         for(target in inTargets)
+            buildTarget(target,destination);
+      }
 
       var linkOutputs = mDefines.get("HXCPP_LINK_OUTPUTS");
       if (linkOutputs!=null)
@@ -1888,7 +1900,6 @@ class BuildTool
          if (targets.length==0)
             targets.push("default");
 
-
          new BuildTool(makefile,defines,targets,include_path,dirtyList);
       }
    }

tools/hxcpp/Compiler.hx

@@ -226,7 +226,7 @@ class Compiler
       return args;
    }
 
-   function getArgs(inFile:File)
+   public function getArgs(inFile:File)
    {
       var nvcc = inFile.isNvcc();
       var asm = inFile.isAsm();