Update 2016-05-13-rustup.md

Author: bschwind

_posts/2016-05-13-rustup.md

@@ -401,7 +401,7 @@ so we don't have to keep calling cargo with the `--target` option.
 target = "arm-linux-androideabi"
 
 [target.arm-linux-androideabi]
-linker = "/home/rust/android-18-toolchain"
+linker = "/home/rust/android-18-toolchain/bin/arm-linux-androideabi-clang"
 ```
 
 Now let's change back to the 'hello' project directory and try