use generic vulkan loader instead intel loader

[Gustavo Alvarez]

vkcube needs headers from intel vulkan implementation

common.h:21:10: error fatal: vulkan/vulkan_intel.h: No existe el fichero o el directorio
 #include <vulkan/vulkan_intel.h>
          ^~~~~~~~~~~~~~~~~~~~~~~
compilación terminada.
make[1]: *** [Makefile:478: vkcube-cube.o] Error 1

is possible use generic vulkan implementation?

https://github.com/KhronosGroup/Vulkan-LoaderAndValidationLayers

greetings

[Kristian Høgsberg Kristensen]

This should work now.