layers: Codegen VkBool32/enum parameter validation

layers: Codegen VkBool32/enum parameter validation

Now generating the VkBool32 and enum checks:
 - Warns if a VkBool32 parameter is neither VK_TRUE nor VK_FALSE
 - Warns if an enum token value falls outside of the enum's
   begin/end range and the token was not added by an extension.
   Only checkes enum's that have a begin/end range.  Detection
   of tokens added by extensions is based on the base_value defined
   in appendic C.10 of the Vulkan specification.

Change-Id: Id49ace52fea8a35972f96d54247b98aba182c09e