udns: Fix for Linuxbrew
udns: Fix for Linuxbrew

'/usr/bin/gcc-5 -dynamiclib' is Mac only,
so use "make sharedlib" instead of "make dylib".

Also, don't apply the patch.

Closes Linuxbrew/homebrew-core#1720

Closes Linuxbrew/homebrew-core#1816.

Signed-off-by: Bob W. Hogg <c772a964fd55352a3510e5d535dd9ccc9ac30168@linux.com>

Linuxbrew/homebrew-core,maxim-belkin/homebrew-core,LinuxbrewTestBot/homebrew-core,rwhogg/homebrew-core,maxim-belkin/homebrew-core,rwhogg/homebrew-core,Linuxbrew/homebrew-core,LinuxbrewTestBot/homebrew-core