Re-enable tests on Android

Closes rust-lang#10393.

Author: tamird

src/test/bench/shootout-k-nucleotide-pipes.rs

@@ -8,9 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// ignore-android: FIXME(#10393)
-// ignore-pretty very bad with line comments
-
 // multi tasking k-nucleotide
 
 use std::ascii::AsciiExt;

src/test/bench/shootout-k-nucleotide.rs

@@ -38,8 +38,6 @@
 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 // OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// ignore-android see #10393 #13206
-
 #![feature(box_syntax, std_misc, collections)]
 
 use std::ascii::OwnedAsciiExt;

src/test/bench/shootout-reverse-complement.rs

@@ -38,8 +38,6 @@
 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 // OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// ignore-android see #10393 #13206
-
 #![feature(libc, scoped)]
 
 extern crate libc;