Fix x86 build to use <elf.h>.

Change-Id: I7b697d5eae69dc08eb31471a42cb8bbe5360be76
diff --git a/libc/bionic/dl_iterate_phdr_static.c b/libc/bionic/dl_iterate_phdr_static.c
index b8ef9e9..90ed1b7 100644
--- a/libc/bionic/dl_iterate_phdr_static.c
+++ b/libc/bionic/dl_iterate_phdr_static.c
@@ -26,8 +26,8 @@
  * SUCH DAMAGE.
  */
 
+#include <elf.h>
 #include <sys/types.h>
-#include <linux/elf.h>
 #include <link.h>
 
 /* Dynamic binaries get this from the dynamic linker (system/linker), which