Really fix Mac build.

This reverts commit 66bfb9adac2798ccdb341a0ad328836761cf4bcb, and
instead includes a header that has a definition of TEMP_FAILURE_RETRY
for macOS.

Bug: http://b/181852591
Test: N/A
Change-Id: I63ccdcb58a2b2806217e3faedde9ba33936c8189
2 files changed