[turbolizer] Match instruction offsets as a hexadecimal numbers

The output of disassemblers was changed to display instruction offsets as
hexadecimal numbers instead of a decimal numbers. Reflect this change in
turbolizer.

BUG=

Review-Url: https://codereview.chromium.org/2885453002
Cr-Commit-Position: refs/heads/master@{#45315}

tools/turbolizer/disassembly-view.js

@@ -87,7 +87,7 @@ class DisassemblyView extends TextView {
         [/^.*/, UNCLASSIFIED_STYLE, -1]
       ],
       [
-        [/^\s+\d+\s+[0-9a-f]+\s+/, NUMBER_STYLE, 2],
+        [/^\s+[0-9a-f]+\s+[0-9a-f]+\s+/, NUMBER_STYLE, 2],
         [/^.*/, null, -1]
       ],
       [