valgrind: avoid including linux/ptrace.h to fix a musl build error

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 41054

package/devel/valgrind/patches/120-no_linux_ptrace_h.patch

+--- a/coregrind/vgdb.c
++++ b/coregrind/vgdb.c
+@@ -102,7 +102,6 @@ I_die_here : (PTRACEINVOKER) architectur
+ #include <sys/user.h>
+ #if defined(VGO_linux)
+ #  include <sys/prctl.h>
+-#  include <linux/ptrace.h>
+ #endif
+ #endif
+