render/vulkan: Fix clang compiler error in 32 bit ARM Android
This adds proper calling convention attribute for callbacks used in vulkan
and fixes the following compiler error.
../src/render/vulkan/vulkan.c:175:22: error: incompatible function pointer types
initializing 'PFN_vkDebugUtilsMessengerCallbackEXT' (aka 'unsigned int (*)
(enum VkDebugUtilsMessageSeverityFlagBitsEXT, unsigned int, const struct
VkDebugUtilsMessengerCallbackDataEXT *, void *) __attribute__((pcs("aapcs-vfp")))')
with an expression of type 'VkBool32 (*)(VkDebugUtilsMessageSeverityFlagBitsEXT,
VkDebugUtilsMessageTypeFlagsEXT, const VkDebugUtilsMessengerCallbackDataEXT *, void *)'
(aka 'unsigned int (*)(enum VkDebugUtilsMessageSeverityFlagBitsEXT, unsigned int,
const struct VkDebugUtilsMessengerCallbackDataEXT *, void *)')
[-Wincompatible-function-pointer-types]
.pfnUserCallback = &debug_callback,
^~~~~~~~~~~~~~~
dd2061b073