Changed jalr test

tests/jalr.s

@@ -12,15 +12,17 @@ _start:
     # Try to call two imbricated functions
     jal fn0
 
-    auipc t0, 0
+    auipc ra, 0
-    jalr ra, 12(t0)
+    jalr 12(ra)
 
     ebreak
 
 # just_after : address is 12 bytes after auipc
 just_after:
+    # ra must still be the old address
     addi a0, zero, 0
     ret
+    addi a0, zero, 1
     ebreak
 
 # fn0 : function that calls fn1 and returns