Remove linux native libraries and automate configure.

thirdparty/linux/Eluant.dll.config

@@ -1,4 +0,0 @@
-<configuration>
-  <dllmap os="linux" dll="lua51.dll" cpu="x86" target="liblua32.5.1.5.so" />
-  <dllmap os="linux" dll="lua51.dll" cpu="x86-64" target="liblua64.5.1.5.so" />
-</configuration>

thirdparty/linux/SDL2-CS.dll.config

@@ -1,15 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<configuration>
-  <dllmap os="linux" dll="SDL2.dll" cpu="x86" target="libSDL232.2.0.2.so" />
-  <dllmap os="linux" dll="SDL2.dll" cpu="x86-64" target="libSDL264.2.0.2.so" />
-
-  <dllmap dll="soft_oal.dll" os="linux" target="libopenal.so.1"/>
-
-  <dllmap dll="opengl32.dll">
-    <dllentry os="linux" dll="libGL.so.1" />
-  </dllmap>
-
-  <dllmap dll="glu32.dll">
-    <dllentry os="linux" dll="libGLU.so.1" />
-  </dllmap>
-</configuration>