CodeStubAssembler::ComputeSeededHash is passing key as Int32 to
ComputeSeededIntegerHash, but ComputeSeededIntegerHash only accepts
Uint32 value.
This could cause problems on s390 and ppc because GCC expects any
value less than 8 bytes sign/zero-extending to 64-bits by the caller,
therefore, the static cast from uint32->uint64 will be treated as
no-op (expecting zero-ext instead), which leads to unexpected
behaviors.

Change-Id: Icd1eecaea1415e36c0c13eef513ff69cc418f247
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1940209Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#65239}