[WATCHLIST] Add BytecodeGraphBuilder and InterpreterAssembler to interpreter watchlist.

Review URL: https://codereview.chromium.org/1657683002

Cr-Commit-Position: refs/heads/master@{#33663}

WATCHLISTS

@@ -44,6 +44,8 @@
     },
     'interpreter': {
       'filepath': 'src/interpreter/' \
+                  '|src/compiler/interpreter' \
+                  '|src/compiler/bytecode' \
                   '|test/cctest/interpreter/' \
                   '|test/unittests/interpreter/',
     },