i586 support (#76)

Author: mon

src/lib.rs

@@ -179,6 +179,8 @@ impl Build {
             "armv7-unknown-linux-gnueabihf" => "linux-armv4",
             "armv7-unknown-linux-musleabihf" => "linux-armv4",
             "asmjs-unknown-emscripten" => "gcc",
+            "i586-unknown-linux-gnu" => "linux-elf",
+            "i586-unknown-linux-musl" => "linux-elf",
             "i686-apple-darwin" => "darwin-i386-cc",
             "i686-linux-android" => "linux-elf",
             "i686-pc-windows-gnu" => "mingw",