core.sys.posix.signal: add @System

WalterBright · WalterBright · commit 8ed4b0af0982 · 2020-03-26T10:20:53.000-07:00
diff --git a/src/core/sys/posix/signal.d b/src/core/sys/posix/signal.d
@@ -44,7 +44,7 @@ version (X86_64)  version = X86_Any;
 version (Posix):
 extern (C):
 //nothrow:  // this causes http://issues.dlang.org/show_bug.cgi?id=12738 (which has been fixed)
-//@system:
+@system:
 
 //
 // Required
