fixup of the previous- no sysctl header on musl
--
--- a/media/ffvpx/config_unix_aarch64.h
+++ b/media/ffvpx/config_unix_aarch64.h
@@ -329,7 +329,7 @@
 #define HAVE_SLEEP 0
 #define HAVE_STRERROR_R 1
 #define HAVE_SYSCONF 1
-#define HAVE_SYSCTL 1
+#define HAVE_SYSCTL 0
 #define HAVE_USLEEP 1
 #define HAVE_UTGETOSTYPEFROMSTRING 0
 #define HAVE_VIRTUALALLOC 0