Skip stress/call-apply-exponential-bytecode-size.js unless x86-64 or arm64

Skip stress/call-apply-exponential-bytecode-size.js unless x86-64 or arm64
https://bugs.webkit.org/show_bug.cgi?id=180712

Reviewed by Michael Catanzaro.

stress/call-apply-exponential-bytecode-size.js crashes if the
ExecutableAllocator's fixedExecutableMemoryPoolSize is less than 64
MB. Currently it is 64 MB or more only on x86-64 and arm64, so we
should skip the test on other platforms.

* stress/call-apply-exponential-bytecode-size.js:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@226060 268f45cc-cd09-0410-ab3c-d52691b4dbfc