[dev.cc] cmd/asm: fix build: broken end to end test

This time for sure.

Change-Id: I77ed6b70d82a6f4ba371afba2f53c8b146ac110f
Reviewed-on: https://go-review.googlesource.com/5530Reviewed-by: Rob Pike <r@golang.org>

src/cmd/asm/internal/asm/testdata/arm.out

@@ -45,10 +45,9 @@
 197 00045 (testdata/arm.s:197)	ADDD.S	F1,F2,F3
 198 00046 (testdata/arm.s:198)	ADDD.S	$0.5,F2,F3
 204 00047 (testdata/arm.s:204)	CMPD.S	F1,F2
-228 00048 (testdata/arm.s:228)	MRC	,$8301712627
-237 00049 (testdata/arm.s:237)	MULL	R1,R2,(R3, R4)
-249 00050 (testdata/arm.s:249)	MULAWT	R1,R2,R3, R4
-257 00051 (testdata/arm.s:257)	PLD	0(R1),
-258 00052 (testdata/arm.s:258)	PLD	4(R1),
-267 00053 (testdata/arm.s:267)	RET	,
-276 00054 (testdata/arm.s:276)	END	,
+238 00048 (testdata/arm.s:238)	MULL	R1,R2,(R3, R4)
+250 00049 (testdata/arm.s:250)	MULAWT	R1,R2,R3, R4
+258 00050 (testdata/arm.s:258)	PLD	0(R1),
+259 00051 (testdata/arm.s:259)	PLD	4(R1),
+268 00052 (testdata/arm.s:268)	RET	,
+277 00053 (testdata/arm.s:277)	END	,

src/cmd/asm/internal/asm/testdata/arm.s

@@ -225,8 +225,7 @@ TEXT	foo(SB), 0, $0
 //			(1<<4));			/* must be set */
 //		outcode(AMRC, Always, &nullgen, 0, &g);
 //	}
-// TODO: Representation in printout differs between 32- and 64-bit machines.
-// Fix the output in obj/arm and restore this.
+// TODO: Disabled until printout for this instruction is the same for 32 and 64 bits.
 //	MRC.S	4, 6, R1, C2, C3, 7
 
 //