Rollup merge of rust-lang#59690 - xfix:patch-17, r=cramertj

Mark unix::ffi::OsStrExt methods as inline

This is a small change, but I found it surprising it's not inlined looking at the assembly.

Author: Centril

src/libstd/ffi/os_str.rs

@@ -960,6 +960,7 @@ impl IntoInner<Buf> for OsString {
 }
 
 impl AsInner<Slice> for OsStr {
+    #[inline]
     fn as_inner(&self) -> &Slice {
         &self.inner
     }

src/libstd/sys_common/os_str_bytes.rs

@@ -236,9 +236,11 @@ pub trait OsStrExt {
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl OsStrExt for OsStr {
+    #[inline]
     fn from_bytes(slice: &[u8]) -> &OsStr {
         unsafe { mem::transmute(slice) }
     }
+    #[inline]
     fn as_bytes(&self) -> &[u8] {
         &self.as_inner().inner
     }