Fix bash cross-build on NetBSD by pre-answering autoconf run-tests.

Index: shells/bash/Makefile
===================================================================
RCS file: /cvsroot/pkgsrc/shells/bash/Makefile,v
retrieving revision 1.56
diff -p -u -r1.56 Makefile
--- shells/bash/Makefile	12 Feb 2013 23:31:40 -0000	1.56
+++ shells/bash/Makefile	23 Apr 2013 13:29:21 -0000
@@ -85,6 +85,21 @@ BUILDLINK_API_DEPENDS.readline+=	readlin
 .include "../../devel/readline/buildlink3.mk"
 .endif
 
+.if !empty(USE_CROSS_COMPILE:M[yY][eE][sS]) && ${OPSYS} == "NetBSD"
+CONFIGURE_ENV+=		CC_FOR_BUILD=${NATIVE_CC:Q}
+CONFIGURE_ENV+=		ac_cv_c_long_long=yes
+CONFIGURE_ENV+=		ac_cv_c_long_double=yes
+CONFIGURE_ENV+=		bash_cv_type_rlimit=yes
+CONFIGURE_ENV+=		bash_cv_getcwd_malloc=yes
+CONFIGURE_ENV+=		bash_cv_func_sigsetjmp=yes
+CONFIGURE_ENV+=		bash_cv_printf_a_format=yes
+CONFIGURE_ENV+=		bash_cv_job_control_missing=present
+CONFIGURE_ENV+=		bash_cv_sys_named_pipes=present
+CONFIGURE_ENV+=		bash_cv_unusable_rtsigs=no
+CONFIGURE_ENV+=		bash_cv_func_ctype_nonascii=yes
+CONFIGURE_ENV+=		bash_cv_wexitstatus_offset=8
+.endif
+
 post-install:
 	${INSTALL_MAN} ${WRKSRC}/doc/bash.1 ${DESTDIR}${PREFIX}/${PKGMANDIR}/man1
 	${INSTALL_MAN} ${WRKSRC}/doc/bashbug.1 ${DESTDIR}${PREFIX}/${PKGMANDIR}/man1