Add missing arch-specific AT_ cruft.

AP_FPUCW is referenced by valgrind.

Bug: https://bugs.kde.org/show_bug.cgi?id=339945
Test: valgrind builds with one less hack
Change-Id: I7146f3709286662108cc82ba3c55ce935375a1f1
diff --git a/libc/include/sys/auxv.h b/libc/include/sys/auxv.h
index 2fa637e..ab5a39d 100644
--- a/libc/include/sys/auxv.h
+++ b/libc/include/sys/auxv.h
@@ -25,12 +25,14 @@
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
+
 #ifndef _SYS_AUXV_H_
 #define _SYS_AUXV_H_
 
-#include <linux/auxvec.h>
 #include <sys/cdefs.h>
 
+#include <bits/auxvec.h>
+
 __BEGIN_DECLS
 
 unsigned long int getauxval(unsigned long int type) __INTRODUCED_IN(18);