On Windows, long is 32-bits, so the 'L' suffix shouldn't be used if a
64-bit value is needed. This caused a test failure in 'Int64MulWithImmediate'.

Change-Id: I93c43a1f166aa0e5bcd53aaf7a860fffd006fd0b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1627538
Commit-Queue: Martyn Capewell <martyn.capewell@arm.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61986}