message: Move format.cc from VULKAN_SRC to SRC
  Support for building demos on a platform without Vulkan support
diff: @@ -4,7 +4,6 @@ set(PROJECT demos)
  set(VULKAN_SRC
  3rdparty/volk/volk.c
  - 3rdparty/fmt/format.cc
  vk/vk_helpers.cpp
  vk/vk_test.cpp
  vk/vk_adv_cbuffer_zoo.cpp
  @@ -100,6 +99,7 @@ set(OPENGL_SRC
  gl/gl_vertex_attr_zoo.cpp)
  set(SRC main.cpp
  + 3rdparty/fmt/format.cc
  test_common.cpp
  texture_zoo.cpp)
  