parted: add patch to fix musl build

Fixes:

  http://autobuild.buildroot.org/results/e1b/e1b6de7b234f2ec154d772ee93e33275dff38f3e/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/parted/0004-fix-includes-for-musl.patch

@@ -0,0 +1,18 @@
+Include <fcntl.h> to get loff_t definition
+
+Patch borrowed from Alpine Linux at
+http://git.alpinelinux.org/cgit/aports/plain/main/parted/fix-includes.patch. Solves
+build with musl.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+
+--- parted-3.1.orig/libparted/fs/xfs/platform_defs.h
++++ parted-3.1/libparted/fs/xfs/platform_defs.h
+@@ -35,6 +35,7 @@
+ #define __XFS_PLATFORM_DEFS_H__
+ 
+ #include <stdio.h>
++#include <fcntl.h>
+ #include <stdarg.h>
+ #include <assert.h>
+ #include <endian.h>