Pull request: all: add native endianness, imp Makefile

Merge in DNS/adguard-home from fix-some to master

Squashed commit of the following:

commit 190e9a88d9c0f2bfc597aa61b41dae8b8686158e
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Tue Mar 16 20:50:02 2021 +0300

    all: add native endianness, imp Makefile

internal/aghos/endian_big.go

@@ -0,0 +1,10 @@
+// +build mips mips64
+
+// This file is an adapted version of github.com/josharian/native.
+
+package aghos
+
+import "encoding/binary"
+
+// NativeEndian is the native endianness of this system.
+var NativeEndian = binary.BigEndian

internal/aghos/endian_little.go

@@ -0,0 +1,10 @@
+// +build amd64 386 arm arm64 mipsle mips64le ppc64le
+
+// This file is an adapted version of github.com/josharian/native.
+
+package aghos
+
+import "encoding/binary"
+
+// NativeEndian is the native endianness of this system.
+var NativeEndian = binary.LittleEndian