Inline try_from and try_into

To avoid link time dependency between core and compiler-builtins, when
using opt-level that implicitly enables -Zshare-generics.

While compiler-builtins should be compiled with -Zshare-generics
disabled, the -Zbuild-std does not ensure this at the moment.

library/core/src/convert/mod.rs

@@ -764,6 +764,7 @@ where
 {
     type Error = U::Error;
 
+    #[inline]
     fn try_into(self) -> Result<U, U::Error> {
         U::try_from(self)
     }
@@ -779,6 +780,7 @@ where
 {
     type Error = Infallible;
 
+    #[inline]
     fn try_from(value: U) -> Result<Self, Self::Error> {
         Ok(U::into(value))
     }