Fix x86 build, remove void* arithmetic.

Change-Id: Idc7f14af2e094ac33de315e808176237af063bb8
diff --git a/linker/arch/x86/begin.c b/linker/arch/x86/begin.c
index cdc98e0..051a16a 100755
--- a/linker/arch/x86/begin.c
+++ b/linker/arch/x86/begin.c
@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <stdint.h>
 #include <sys/cdefs.h>
 
 extern unsigned __linker_init(void* raw_args);