Support PERFETTO_EINTR in clang-tidy analyzer.
Support PERFETTO_EINTR in clang-tidy analyzer.

This helps detecting problems where the comparison is done at the wrong
level, e.g. PERFETTO_EINTR(foo() == -1), in which case the EINTR will
not work as expected.

This should be handled by clang-tidy once LLVM 12 is released, matching
LLVM change: https://reviews.llvm.org/D83144.

Change-Id: Ibb8e1c09f3f1412a5971e0d83c96183fa1725b0a
google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto