dumpet: fix build on big endian musl

Author: q66

srcpkgs/dumpet/patches/endian.patch

@@ -0,0 +1,18 @@
+commit a3db0a3574271fea9be5f9a8832bead210686130
+Author: q66 <daniel@octaforge.org>
+Date:   Tue Jan 7 02:03:11 2020 +0100
+
+    Include byteswap.h to prevent undefined references on BE musl
+
+diff --git endian.h endian.h
+index 7c78807..3cae0e1 100644
+--- endian.h
++++ endian.h
+@@ -20,6 +20,7 @@
+ #define ENDIAN_H
+ 
+ #include <endian.h>
++#include <byteswap.h>
+ 
+ #if __BYTE_ORDER == __LITTLE_ENDIAN
+ #define cpu_to_le16(x) (x)