seminaries/qtrvsim: ffs-as-log2 comment final catch loop.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

seminaries/qtrvsim/ffs-as-log2/ffs-as-log2.S

@@ -15,5 +15,5 @@ loop:				// {
 	bne	a0, zero, loop	//}
 done:
 	addi	a0, t1, 0
-finish:	ebreak
-        	beq	zero, zero, finish
+finish:	ebreak			// stop execution
+	beq	zero, zero, finish	// loop to catch continue