[compiler-rt] Fix test ifdefs and XFAILs (#160687)

This fixes the ifdefs added in
e9e166e54354330c474457711a8e7a7ca2efd731; we need to include int_lib.h
first before we can expect these defines to be set.

Also remove the XFAILs for aarch64 windows. As this test now became a
no-op on platforms that lack CRT_HAS_128BIT or CRT_HAS_F128 (aarch64
windows lacks the latter), it no longer fails.

GitOrigin-RevId: 656707086e5f6fccd2eb57f5aaf987c328c0f4f1
2 files changed