Fixes this error when compiling the openat crate for 32-bit Android:
error[E0308]: mismatched types
   --> /home/builder/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/openat-0.1.21/src/dir.rs:472:17
    |
471 |             match stat.st_mode & libc::S_IFMT as u32 {
    |                   ---------------------------------- this expression has type `u32`
472 |                 libc::S_IFDIR => Ok(Dir(fd)),
    |                 ^^^^^^^^^^^^^ expected `u32`, found `u16`

--- a/src/dir.rs
+++ b/src/dir.rs
@@ -462,10 +462,16 @@ impl Dir {
         if res < 0 {
             Err(io::Error::last_os_error())
         } else {
+            #[cfg(not(all(target_os = "android", target_pointer_width = "32")))]
             match stat.st_mode & libc::S_IFMT {
                 libc::S_IFDIR => Ok(Dir(fd)),
                 _ => Err(io::Error::from_raw_os_error(libc::ENOTDIR))
             }
+            #[cfg(all(target_os = "android", target_pointer_width = "32"))]
+            match stat.st_mode as u16 & libc::S_IFMT {
+                libc::S_IFDIR => Ok(Dir(fd)),
+                _ => Err(io::Error::from_raw_os_error(libc::ENOTDIR))
+            }
         }
     }
 
--- a/src/metadata.rs
+++ b/src/metadata.rs
@@ -17,7 +17,10 @@ pub struct Metadata {
 impl Metadata {
     /// Returns simplified type of the directory entry
     pub fn simple_type(&self) -> SimpleType {
+        #[cfg(not(all(target_os = "android", target_pointer_width = "32")))]
         let typ = self.stat.st_mode & libc::S_IFMT;
+        #[cfg(all(target_os = "android", target_pointer_width = "32"))]
+        let typ = self.stat.st_mode as u16 & libc::S_IFMT;
         match typ {
             libc::S_IFREG => SimpleType::File,
             libc::S_IFDIR => SimpleType::Dir,