Need to allocate memory via callback to renderdoc.dll as well as freeing

* This whole interface really needs a tidy-up at some point, but for now
  this is enough.

renderdoc/replay/entry_points.cpp

@@ -383,6 +383,12 @@ void RENDERDOC_CC RENDERDOC_FreeArrayMem(const void *mem)
 	rdctype::array<char>::deallocate(mem);
 }
 
+extern "C" RENDERDOC_API
+void *RENDERDOC_CC RENDERDOC_AllocArrayMem(size_t sz)
+{
+	return rdctype::array<char>::allocate(sz);
+}
+
 extern "C" RENDERDOC_API
 void RENDERDOC_CC RENDERDOC_InitRemoteAccess(uint32_t *ident)
 {