Update json manifest
Updates the api_version to 1.2 in the json manifest. Also, adds the entrypoints node in the device extensions as it is mandated by the loader's documentation when an extension adds Vulkan API functions.
Removes support for intercepting vkEnumerateInstanceLayerProperties, vkEnumerateInstanceExtensionProperties and vkEnumerateDeviceExtensionProperties as the loader can get the information they provide from the layer's json manifest in its terminator functions.
Change-Id: I2c304d1d2ea17d3ea0c723694f8fc4c8a92054a0 Signed-off-by: Iason Paraskevopoulos iason.paraskevopoulos@arm.com