Fix Android build after Mac iteration

src/common.h

@@ -16,7 +16,7 @@
 #   define _GNU_SOURCE 1
 #endif
 
-#if !defined(TEMP_FAILURE_RETRY)
+#ifdef __APPLE__
 #   warning DEFINING CUSTOM TEMP_FAILURE_RETRY(x) macro
 #   define TEMP_FAILURE_RETRY(exp) ({ \
         typeof (exp) _rc; \

src/misc.c

@@ -68,8 +68,6 @@ static void _shutdown_threads(void) {
         static struct timespec ts = { .tv_sec=0, .tv_nsec=33333333 };
         nanosleep(&ts, NULL); // 30Hz framerate
     } while (1);
-#   elif !defined(__APPLE__)
-#       error TODO FIXME ... verify leaks-n-things with Valgrind on unknown platform
 #   endif
 #endif
 }