Build with newer Boost. From Fedora.

Index: gr-filter/lib/freq_xlating_fir_filter_impl.cc
--- gr-filter/lib/freq_xlating_fir_filter_impl.cc.orig
+++ gr-filter/lib/freq_xlating_fir_filter_impl.cc
@@ -32,6 +32,8 @@
 namespace gr {
 namespace filter {
 
+using namespace boost::placeholders;
+
 template <class IN_T, class OUT_T, class TAP_T>
 typename freq_xlating_fir_filter<IN_T, OUT_T, TAP_T>::sptr
 freq_xlating_fir_filter<IN_T, OUT_T, TAP_T>::make(int decimation,
