godefs: add enum/const testdata

Also, add golden output data for linux/arm.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5256041

src/cmd/godefs/testdata.c

@@ -39,3 +39,14 @@ struct T5 {
 typedef struct T5 T5;
 typedef struct T4 $T4;
 typedef T5 $T5;
+
+// Test constants and enumerations are printed correctly. clang/2.9 with 
+// -O2 and above causes Bprint to print %#llx values incorrectly.
+enum {
+	$sizeofPtr = sizeof(void*),
+	$sizeofShort = sizeof(short),
+	$sizeofInt = sizeof(int),
+	$sizeofLong = sizeof(long),
+	$sizeofLongLong = sizeof(long long),
+};
+

src/cmd/godefs/testdata_darwin_386.golden

@@ -5,6 +5,13 @@
 package test
 
 // Constants
+const (
+	sizeofPtr = 0x4;
+	sizeofShort = 0x2;
+	sizeofInt = 0x4;
+	sizeofLong = 0x4;
+	sizeofLongLong = 0x8;
+)
 
 // Types
 

src/cmd/godefs/testdata_darwin_amd64.golden

@@ -5,6 +5,13 @@
 package test
 
 // Constants
+const (
+	sizeofPtr = 0x8;
+	sizeofShort = 0x2;
+	sizeofInt = 0x4;
+	sizeofLong = 0x8;
+	sizeofLongLong = 0x8;
+)
 
 // Types
 

src/cmd/godefs/testdata_linux_arm.golden

+// ./godefs -g test testdata.c
+
+// MACHINE GENERATED - DO NOT EDIT.
+
+package test
+
+// Constants
+const (
+	sizeofPtr = 0x4;
+	sizeofShort = 0x2;
+	sizeofInt = 0x4;
+	sizeofLong = 0x4;
+	sizeofLongLong = 0x8;
+)
+
+// Types
+
+type T2 struct {
+	A uint8;
+	Pad_godefs_0 [3]byte;
+	B uint32;
+	C uint32;
+	D uint16;
+	Pad_godefs_1 [2]byte;
+}
+
+type T3 struct {
+	A uint8;
+	Pad_godefs_0 [3]byte;
+	Pad0 int32;
+}
+
+type T4 struct {
+}
+
+type T5 struct {
+	A *T4;
+}