[wasm-objdump] Print i64 values as unsigned (#2344)

This matches the behaviour of i32 printing.

Ref: #2342

Author: rvagg

src/binary-reader-objdump.cc

@@ -853,7 +853,7 @@ Result BinaryReaderObjdumpDisassemble::OnOpcodeUint64(uint64_t value) {
   if (!in_function_body) {
     return Result::Ok;
   }
-  LogOpcode("%" PRId64, value);
+  LogOpcode("%" PRIu64, value);
   return Result::Ok;
 }
 

test/dump/const.txt

@@ -242,15 +242,15 @@ Code Disassembly:
  00002f: 1a                         | drop
  000030: 42 00                      | i64.const 0
  000032: 1a                         | drop
- 000033: 42 80 80 80 80 80 80 80 80 | i64.const -9223372036854775808
+ 000033: 42 80 80 80 80 80 80 80 80 | i64.const 9223372036854775808
  00003c: 80 7f                      | 
  00003e: 1a                         | drop
- 00003f: 42 7f                      | i64.const -1
+ 00003f: 42 7f                      | i64.const 18446744073709551615
  000041: 1a                         | drop
- 000042: 42 80 80 80 80 80 80 80 80 | i64.const -9223372036854775808
+ 000042: 42 80 80 80 80 80 80 80 80 | i64.const 9223372036854775808
  00004b: 80 7f                      | 
  00004d: 1a                         | drop
- 00004e: 42 7f                      | i64.const -1
+ 00004e: 42 7f                      | i64.const 18446744073709551615
  000050: 1a                         | drop
  000051: 43 00 00 00 00             | f32.const 0x0p+0
  000056: 1a                         | drop