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
diff --git a/libcutils/fs_config.cpp b/libcutils/fs_config.cpp
index 54eeeac..d69c038 100644
--- a/libcutils/fs_config.cpp
+++ b/libcutils/fs_config.cpp
@@ -35,6 +35,7 @@
 #include <string>
 
 #include <android-base/strings.h>
+#include <cutils/fs.h>
 #include <log/log.h>
 #include <private/android_filesystem_config.h>