1) Moved tprintf and related functions to their own file in common/libc/printf/tprintf.c.

This file is included by both libc and hostcompat.

2) Changed printf -> tprintf in all testbin programs

userland/testbin/faulter/faulter.c

@@ -45,12 +45,12 @@ main(void)
 {
 	volatile int i;
 
-	printf("\nEntering the faulter program - I should die immediately\n");
+	tprintf("\nEntering the faulter program - I should die immediately\n");
 	i = *(int *)REALLY_BIG_ADDRESS;
 
 	// gcc 4.8 improperly demands this
 	(void)i;
 
-	printf("I didn't get killed!  Program has a bug\n");
+	tprintf("I didn't get killed!  Program has a bug\n");
 	return 0;
 }