refactor, libc made optional

Common/Timer/posix.c

@@ -1,11 +1,9 @@
+#include "../std.h"
 #include "timer.h"
 #include <stdint.h>
-#include <stdio.h>
 #define __USE_POSIX199309 1
 #include <time.h>
 
-/* TODO: Rename to posix.c */
-
 uint64_t com_timer_count_ns(void) {
   struct timespec time;
   clock_gettime(CLOCK_MONOTONIC, &time);
@@ -15,5 +13,5 @@ uint64_t com_timer_count_ns(void) {
 void com_timer_profile(uint64_t starttime, const char *what) {
   uint64_t const endtime = com_timer_count_ns();
   uint64_t const diff = endtime - starttime;
-  printf("profile \"%s\" took %fms\n", what, (double)diff / 1000000);
+  com_std_printf("profile \"%s\" took %fms\n", what, (double)diff / 1000000);
 }