lang-item: Add Sync trait

gcc/rust/ChangeLog:

	* util/rust-lang-item.h: Add Sync marker trait.
	* util/rust-lang-item.cc: Likewise.

Author: CohenArthur

gcc/rust/util/rust-lang-item.cc

@@ -62,6 +62,7 @@ const BiMap<std::string, LangItem::Kind> Rust::LangItem::lang_items = {{
   {"copy", Kind::COPY},
   {"clone", Kind::CLONE},
   {"sized", Kind::SIZED},
+  {"sync", Kind::SYNC},
   {"slice_alloc", Kind::SLICE_ALLOC},
   {"slice_u8_alloc", Kind::SLICE_U8_ALLOC},
   {"str_alloc", Kind::STR_ALLOC},

gcc/rust/util/rust-lang-item.h

@@ -82,6 +82,7 @@ class LangItem
     COPY,
     CLONE,
     SIZED,
+    SYNC,
 
     // https://github.com/Rust-GCC/gccrs/issues/1896
     // https://github.com/rust-lang/rust/commit/afbecc0f68c4dcfc4878ba5bcb1ac942544a1bdc