Enable test case Integers.swift.gyb under x86_64 (and hence Linux x86_64)

[practicalswift]

What's in this pull request?

Enable test case Integers.swift.gyb under x86_64 (and hence Linux x86_64).

Resolved bug number: –

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[tkremenek]

@swift-ci please test

[practicalswift]

@swift-ci Please test again - I believe the build failure is spurious :-)

[gottesmm]

@swift-ci Please test OS X Platform

(Not reviewing, just drive by starting test)

[gottesmm]

@swift-ci Please test OS X Platform

[practicalswift]

Is the OS X error real? Everything works fine under Linux and considering that this test was enabled previously under OS X this change shouldn't change the state of things under OS X :-)

[jrose-apple]

Yes, that's real. OS X includes the iOS simulators, and the failure is happening on the i386 simulator. Apparently we can't generate the double-width multiplication there; it's probably something that compiler-rt provides since there's no hardware support.

[practicalswift]

@jrose-apple Ah, I see. I've now changed from CPU=i386_or_x86_64 to CPU=x86_64. That should solve the issue? :-)

[practicalswift]

@swift-ci Please test :-)

[gribozavr]

@swift-ci Please test and merge