Mark gcRanges() with return attribute

Fix Issue 23051 - OpenBSD: Build broken on 2.100.0-beta.1 due to the inout attribute no longer implying the return attribute

Author: ibara

src/rt/sections_solaris.d

@@ -59,7 +59,7 @@ struct SectionGroup
         return pbeg[0 .. pend - pbeg];
     }
 
-    @property inout(void[])[] gcRanges() inout nothrow @nogc
+    @property inout(void[])[] gcRanges() inout return nothrow @nogc
     {
         return _gcRanges[];
     }