R-RcppCCTZ: needs C++11

Otherwise:
error: 'wcstold' is not a member of 'std'

Author: 0-wiz-0

time/R-RcppCCTZ/Makefile

@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.1 2024/01/21 09:10:20 mef Exp $
+# $NetBSD: Makefile,v 1.2 2024/11/30 20:51:35 wiz Exp $
 
 R_PKGNAME=	RcppCCTZ
 R_PKGVER=	0.2.12
@@ -16,7 +16,8 @@ TEST_DEPENDS+=	tex-latex-bin-[0-9]*:../../print/tex-latex-bin
 TEST_DEPENDS+=	tex-url-[0-9]*:../../print/tex-url
 TEST_DEPENDS+=	tex-xkeyval-[0-9]*:../../print/tex-xkeyval
 
-USE_LANGUAGES=	c c++
+USE_LANGUAGES=		c c++
+USE_CXX_FEATURES+=	c++11
 
 .include "../../math/R/Makefile.extension"
 .include "../../devel/R-Rcpp/buildlink3.mk"