add missing <stdint.h> include

aarch64's fetch.c uses the uintptr_t typedef defined by stdint.h without
including it. This doesn't currently cause a build failure because stdint.h
is indirectly included via proc.h.

Signed-off-by: dann frazier <dannf@debian.org>
diff --git a/sysdeps/linux-gnu/aarch64/fetch.c b/sysdeps/linux-gnu/aarch64/fetch.c
index 8779f03..2744df0 100644
--- a/sysdeps/linux-gnu/aarch64/fetch.c
+++ b/sysdeps/linux-gnu/aarch64/fetch.c
@@ -22,6 +22,7 @@
 #include <asm/ptrace.h>
 #include <stdlib.h>
 #include <string.h>
+#include <stdint.h>
 
 #include "fetch.h"
 #include "proc.h"