Mark de Wever 8f972cb0fd [libc++][nfc] Add TEST_HAS_NO_INT128.
Avoid using the libc++ internal `_LIBCPP_HAS_NO_INT128` in our tests.

Reviewed By: #libc, ldionne

Differential Revision: https://reviews.llvm.org/D117992
2022-01-27 17:31:27 +01:00
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