vk/util: Add anv_abortf(), anv_abortfv()

Convenience functions to print an error message then abort.

src/vulkan/util.c

@@ -43,6 +43,25 @@ __anv_finishme(const char *file, int line, const char *format, ...)
    fprintf(stderr, "%s:%d: FINISHME: %s\n", file, line, buffer);
 }
 
+void anv_noreturn anv_printflike(1, 2)
+anv_abortf(const char *format, ...)
+{
+   va_list va;
+
+   va_start(va, format);
+   anv_abortfv(format, va);
+   va_end(va);
+}
+
+void anv_noreturn
+anv_abortfv(const char *format, va_list va)
+{
+   fprintf(stderr, "vk: error: ");
+   vfprintf(stderr, format, va);
+   fprintf(stderr, "\n");
+   abort();
+}
+
 int
 anv_vector_init(struct anv_vector *vector, uint32_t element_size, uint32_t size)
 {