[libc] Add missing header ioctl.h on aarch64. (#78865)

Author: lntue

libc/config/linux/aarch64/headers.txt

@@ -21,4 +21,6 @@ set(TARGET_PUBLIC_HEADERS
     libc.include.threads
     libc.include.time
     libc.include.unistd
+
+    libc.include.sys_ioctl
 )

libc/src/unistd/linux/CMakeLists.txt

@@ -226,6 +226,7 @@ add_entrypoint_object(
     ../isatty.h
   DEPENDS
     libc.include.unistd
+    libc.include.sys_ioctl
     libc.include.sys_syscall
     libc.src.__support.OSUtil.osutil
     libc.src.errno.errno