Bionic: Always use fortified versions of FD_X macros

When compiling on/for at least Lollipop, always use the fortified
versions of FD_X macros. This works around side-effect issues (which
are explicitly called out in the specification) and generally
increases robustness of code.

Bug: 77986327
Test: mmma bionic
Test: m
Test: bionic_unit_tests
Change-Id: I9096c6872770e46ba5ab64e7375ff83fc0518e07