Fix cross-build of security/libgpg-error.

Index: security/libgpg-error/Makefile
===================================================================
RCS file: /cvsroot/pkgsrc/security/libgpg-error/Makefile,v
retrieving revision 1.36
diff -p -u -r1.36 Makefile
--- security/libgpg-error/Makefile	15 Mar 2013 22:06:01 -0000	1.36
+++ security/libgpg-error/Makefile	23 Apr 2013 13:29:21 -0000
@@ -19,12 +19,17 @@ PKG_INSTALLATION_TYPES=	overwrite pkgvie
 USE_LIBTOOL=		yes
 USE_PKGLOCALEDIR=	yes
 GNU_CONFIGURE=		yes
-CONFIGURE_ENV+=		CC_FOR_BUILD=${CC:Q}\ ${CFLAGS:M*:Q}
 MAKE_ENV+=		LC_ALL="C"
 MAKE_JOBS_SAFE=		no
 
 .include "../../mk/bsd.prefs.mk"
 
+.if !empty(USE_CROSS_COMPILE:M[yY][eE][sS])
+CONFIGURE_ENV+=		CC_FOR_BUILD=${NATIVE_CC:Q}
+.else
+CONFIGURE_ENV+=		CC_FOR_BUILD=${CC:Q}\ ${CFLAGS:M*:Q}
+.endif
+
 # XXX See HACKS
 .if ${OPSYS} == "IRIX" || !empty(MACHINE_PLATFORM:MNetBSD-[3-9]*)
 USE_TOOLS+=		nawk