Enable some ilog2 tests as well

Author: saethlin

library/core/tests/num/int_log.rs

@@ -1,7 +1,4 @@
-//! This tests the `Integer::{ilog,log2,log10}` methods. These tests are in a
-//! separate file because there's both a large number of them, and not all tests
-//! can be run on Android. This is because in Android `ilog2` uses an imprecise
-//! approximation:https://github.com/rust-lang/rust/blob/4825e12fc9c79954aa0fe18f5521efa6c19c7539/src/libstd/sys/unix/android.rs#L27-L53
+//! Tests for the `Integer::{ilog,log2,log10}` methods.
 
 #[test]
 fn checked_ilog() {
@@ -77,10 +74,8 @@ fn checked_ilog2() {
     }
 }
 
-// Validate cases that fail on Android's imprecise float ilog2 implementation.
 #[test]
-#[cfg(not(target_os = "android"))]
-fn checked_ilog2_not_android() {
+fn checked_ilog2() {
     assert_eq!(8192u16.checked_ilog2(), Some((8192f32).log2() as u32));
     assert_eq!(32768u16.checked_ilog2(), Some((32768f32).log2() as u32));
     assert_eq!(8192i16.checked_ilog2(), Some((8192f32).log2() as u32));