Add more code info size dumping to oatdump

Helps break down where oat bytes are being used, example output on
a large app:

OAT FILE STATS:
Dumping cumulative use of 95784720 accounted bytes
Code                            = 68894196 (72% of total)
QuickMethodHeader               =  3071080 ( 3% of total)
CodeInfoEncoding                =  1226080 ( 1% of total)
CodeInfoLocationCatalog         =  1005716 ( 1% of total)
CodeInfoDexRegisterMap          =  5813389 ( 6% of total)
CodeInfoInlineInfo              =  2391251 ( 2% of total)
CodeInfoStackMap                = 13383008 (14% of total)
  StackMapNativePc              =  1607888 (12% of stack map)
  StackMapDexPcEncoding         =  1116724 ( 8% of stack map)
  StackMapDexRegisterMap        =  1277680 (10% of stack map)
  StackMapInlineInfo            =  1082720 ( 8% of stack map)
  StackMapRegisterMaskEncoding  =  5104960 (38% of stack map)
  StackMapMask                  =  3193034 (24% of stack map)
  StackMapOther                 =        0 ( 0% of stack map)

Test: test-art-host, oatdump

Bug: 34621054

Change-Id: I5daf0f1308d126b6a30928f523c6051585f1491f
diff --git a/runtime/stack_map.cc b/runtime/stack_map.cc
index 3c92b86..690b069 100644
--- a/runtime/stack_map.cc
+++ b/runtime/stack_map.cc
@@ -198,6 +198,7 @@
       << "StackMap" << header_suffix
       << std::hex
       << " [native_pc=0x" << code_offset + pc_offset << "]"
+      << " [entry_size=0x" << encoding.stack_map_size_in_bytes << "]"
       << " (dex_pc=0x" << GetDexPc(stack_map_encoding)
       << ", native_pc_offset=0x" << pc_offset
       << ", dex_register_map_offset=0x" << GetDexRegisterMapOffset(stack_map_encoding)