Fix _BSD_SOURCE/__USE_BSD.

Bug: 14659579
Change-Id: I80ec9584f054c02d1078828f6bca759c42bc1d4c

libc/upstream-netbsd/android/include/netbsd-compat.h

@@ -17,6 +17,9 @@
 #ifndef _BIONIC_NETBSD_COMPAT_H_included
 #define _BIONIC_NETBSD_COMPAT_H_included
 
+#define _BSD_SOURCE
+#define _GNU_SOURCE
+
 // NetBSD uses _DIAGASSERT to null-check arguments and the like.
 #include <assert.h>
 #define _DIAGASSERT(e) ((e) ? (void) 0 : __assert2(__FILE__, __LINE__, __func__, #e))
@@ -24,9 +27,6 @@
 // TODO: update our <sys/cdefs.h> to support this properly.
 #define __type_fit(t, a) (0 == 0)
 
-#define _GNU_SOURCE
-#define __USE_BSD
-
 // TODO: we don't yet have thread-safe environment variables.
 #define __readlockenv() 0
 #define __unlockenv() 0