TestNetNative/ResolveUDPAddr failure on Debian based linux

[at-wat]

--- FAIL: TestNetNative (0.01s)
    --- PASS: TestNetNative/Interfaces (0.00s)
    --- FAIL: TestNetNative/ResolveUDPAddr (0.00s)
        net_native_test.go:46: 
            	Error Trace:	net_native_test.go:46
            	Error:      	Not equal: 
            	            	expected: "127.0.0.1"
            	            	actual  : "127.0.1.1"
            	            	
            	            	Diff:
            	            	--- Expected
            	            	+++ Actual
            	            	@@ -1 +1 @@
            	            	-127.0.0.1
            	            	+127.0.1.1
            	Test:       	TestNetNative/ResolveUDPAddr
            	Messages:   	should match

Debian based linux uses 127.0.1.1 as a local loopback address in some condition of the install.
https://www.debian.org/doc/manuals/debian-reference/ch05.en.html#_the_hostname_resolution

ref: #49

[at-wat]

/etc/hosts of Travis-CI Ubuntu Bionic

127.0.1.1 localhost localhost ip4-loopback 
127.0.0.1 localhost nettuno travis vagrant travis-job-99238377-7e10-461c-8ccc-6fdee72e400f