[Interpreter] Ensure we save the BytecodeArray register properly in InterpreterEntryTrampoline builtin.

Ensure that we save the BytecodeArray register in the InterpreterEntryTrampoline
before calling out to the kStackGuard runtime function.

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1426863005

Cr-Commit-Position: refs/heads/master@{#31650}