title: go get sys: textflag.h missing
body: <p>I am trying to use the "sys" package in a go program. So I did</p>
  
  <pre><code>go get golang.org/x/sys/unix
  </code></pre>
  
  <p>and got </p>
  
  <pre><code># golang.org/x/sys/unix
  src/golang.org/x/sys/unix/asm.s:6 6a: No such file or directory: textflag.h
  </code></pre>
  
  <p>I am on Fedora 20, using 
      go version go1.3.3 linux/amd64</p>
  
  <p>Any ideas how to solve this? </p>