Add support for MIPS little-endian targets

Closes #72

Author: gabrielesvelto

src/lib.rs

@@ -625,6 +625,7 @@ impl Config {
                     "powerpc64-unknown-linux-gnu" => Some("powerpc-linux-gnu"),
                     "powerpc64le-unknown-linux-gnu" => Some("powerpc64le-linux-gnu"),
                     "mips-unknown-linux-gnu" => Some("mips-linux-gnu"),
+                    "mipsel-unknown-linux-gnu" => Some("mipsel-linux-gnu"),
                     "i686-pc-windows-gnu" => Some("i686-w64-mingw32"),
                     "x86_64-pc-windows-gnu" => Some("x86_64-w64-mingw32"),
                     "x86_64-unknown-linux-musl" => Some("musl"),