Use __asm__("nop") in the loop-based delays.

Since we recently switched from -O0 to -Os, an increase in the loop count
as well as the addition of __asm__("nop") is required (so that the loop
doesn't get optimized/removed).
The real fix is to add a proper timer-based delay function, of course.

Also, fix a bunch of cosmetic issues and typos.

examples/lpc13xx/lpc-p1343/miniblink/miniblink.c

@@ -35,9 +35,11 @@ int main(void)
 	while (1) {
 		/* Manually: */
 		GPIO3_DATA |= (1 << 0);		/* LED off */
-		for (i = 0; i < 80000; i++);	/* Wait (needs -O0 CFLAGS). */
+		for (i = 0; i < 800000; i++)	/* Wait a bit. */
+			__asm__("nop");
 		GPIO3_DATA &= ~(1 << 0);	/* LED on */
-		for (i = 0; i < 80000; i++);	/* Wait (needs -O0 CFLAGS). */
+		for (i = 0; i < 800000; i++)	/* Wait a bit. */
+			__asm__("nop");
 	}
 
 	return 0;