Update `intrinsics.odin`

base/intrinsics/intrinsics.odin

@@ -138,10 +138,13 @@ type_is_rune       :: proc($T: typeid) -> bool ---
 type_is_float      :: proc($T: typeid) -> bool ---
 type_is_complex    :: proc($T: typeid) -> bool ---
 type_is_quaternion :: proc($T: typeid) -> bool ---
-type_is_string     :: proc($T: typeid) -> bool ---
 type_is_typeid     :: proc($T: typeid) -> bool ---
 type_is_any        :: proc($T: typeid) -> bool ---
+type_is_string     :: proc($T: typeid) -> bool ---
 type_is_string16   :: proc($T: typeid) -> bool ---
+type_is_cstring    :: proc($T: typeid) -> bool ---
+type_is_cstring16  :: proc($T: typeid) -> bool ---
+
 
 type_is_endian_platform       :: proc($T: typeid) -> bool ---
 type_is_endian_little         :: proc($T: typeid) -> bool ---