asterisk-11.x: remove 051-musl-include.patch

It was fixed upstream apparently.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

net/asterisk-11.x/patches/051-musl-includes.patch

@@ -1,42 +0,0 @@
---- a/include/asterisk/compat.h
-+++ b/include/asterisk/compat.h
-@@ -68,7 +68,7 @@
- #endif
- 
- #ifndef AST_POLL_COMPAT
--#include <sys/poll.h>
-+#include <poll.h>
- #else
- #include "asterisk/poll-compat.h"
- #endif
---- a/include/asterisk/poll-compat.h
-+++ b/include/asterisk/poll-compat.h
-@@ -83,7 +83,7 @@
- 
- #ifndef AST_POLL_COMPAT
- 
--#include <sys/poll.h>
-+#include <poll.h>
- 
- #define ast_poll(a, b, c) poll(a, b, c)
- 
---- a/main/ast_expr2.c
-+++ b/main/ast_expr2.c
-@@ -93,6 +93,7 @@
- 
- #include "asterisk.h"
- 
-+#include <sys/cdefs.h>
- #include <sys/types.h>
- #include <stdio.h>
- 
---- a/main/ast_expr2.y
-+++ b/main/ast_expr2.y
-@@ -14,6 +14,7 @@
- 
- #include "asterisk.h"
- 
-+#include <sys/cdefs.h>
- #include <sys/types.h>
- #include <stdio.h>
-