package/gnuradio: needs boost regex module

Since
https://git.gnuradio.org/cgit/gnuradio.git/commit/cmake/Modules/GrBoost.cmake?id=27fbbf22e359e8ec4a04399f3dc139f8c25031cb
gnuradio needs the boost regex module.

Fixes
http://autobuild.buildroot.net/results/d71/d71278032c083c2c4b1bf20b81629225f8965c6e/

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gnuradio/Config.in

@@ -14,6 +14,7 @@ config BR2_PACKAGE_GNURADIO
 	select BR2_PACKAGE_BOOST_DATE_TIME
 	select BR2_PACKAGE_BOOST_FILESYSTEM
 	select BR2_PACKAGE_BOOST_PROGRAM_OPTIONS
+	select BR2_PACKAGE_BOOST_REGEX
 	select BR2_PACKAGE_BOOST_SYSTEM
 	select BR2_PACKAGE_BOOST_THREAD
 	help