package/gnuradio: fix build with boost 1.77.0

package/gnuradio: fix build with boost 1.77.0

Fix the following build failure raised since commit
d39d8f7cee9b4634e6f490020204f63fae419e8e:

In file included from /home/buildroot/autobuild/instance-3/output-1/host/x86_64-buildroot-linux-musl/sysroot/usr/include/boost/math/common_factor.hpp:14,
                 from /home/buildroot/autobuild/instance-3/output-1/build/gnuradio-3.8.2.0/gr-digital/lib/symbol_sync_cc_impl.cc:30:
/home/buildroot/autobuild/instance-3/output-1/host/x86_64-buildroot-linux-musl/sysroot/usr/include/boost/math/common_factor_ct.hpp:17:68: error: _Pragma takes a parenthesized string literal
   17 | BOOST_MATH_HEADER_DEPRECATED("<boost/integer/common_factor_ct.hpp>");
      |

Fixes:
 - http://autobuild.buildroot.org/results/7b4/7b46f51588144bca1d323230c378ce7f6ee999a8/build-end.log

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>