add VHACD, with the addition of Wavefront .obj export

Extras/VHACD/test/src/premake4.lua

@@ -0,0 +1,25 @@
+
+project "test_vhacd"
+
+if _OPTIONS["ios"] then
+	kind "WindowedApp"
+else	
+	kind "ConsoleApp"
+end
+
+includedirs {"../../public"}
+
+links {
+	"vhacd"
+}
+
+language "C++"
+
+files {
+	"main.cpp",
+}
+
+
+if os.is("Linux") then 
+		links {"pthread"}
+end