clang-tidy: apply performance-unnecessary-value-param fix (see http://clang.llvm.org/extra/clang-tidy/checks/performance-unnecessary-value-param.html)

src/algorithms/tracking/gnuradio_blocks/galileo_e1_tcp_connector_tracking_cc.cc

@@ -90,7 +90,7 @@ Galileo_E1_Tcp_Connector_Tracking_cc::Galileo_E1_Tcp_Connector_Tracking_cc(
     int64_t fs_in,
     uint32_t vector_length,
     bool dump,
-    std::string dump_filename,
+    const std::string& dump_filename,
     float pll_bw_hz __attribute__((unused)),
     float dll_bw_hz __attribute__((unused)),
     float early_late_space_chips,

src/algorithms/tracking/gnuradio_blocks/galileo_e1_tcp_connector_tracking_cc.h

@@ -97,7 +97,7 @@ private:
     Galileo_E1_Tcp_Connector_Tracking_cc(
         int64_t fs_in, uint32_t vector_length,
         bool dump,
-        std::string dump_filename,
+        const std::string& dump_filename,
         float pll_bw_hz,
         float dll_bw_hz,
         float early_late_space_chips,

src/algorithms/tracking/gnuradio_blocks/gps_l1_ca_tcp_connector_tracking_cc.cc

@@ -85,7 +85,7 @@ Gps_L1_Ca_Tcp_Connector_Tracking_cc::Gps_L1_Ca_Tcp_Connector_Tracking_cc(
     int64_t fs_in,
     uint32_t vector_length,
     bool dump,
-    std::string dump_filename,
+    const std::string& dump_filename,
     float early_late_space_chips,
     size_t port_ch0) : gr::block("Gps_L1_Ca_Tcp_Connector_Tracking_cc", gr::io_signature::make(1, 1, sizeof(gr_complex)),
                            gr::io_signature::make(1, 1, sizeof(Gnss_Synchro)))

src/algorithms/tracking/gnuradio_blocks/gps_l1_ca_tcp_connector_tracking_cc.h

@@ -93,7 +93,7 @@ private:
     Gps_L1_Ca_Tcp_Connector_Tracking_cc(
         int64_t fs_in, uint32_t vector_length,
         bool dump,
-        std::string dump_filename,
+        const std::string& dump_filename,
         float early_late_space_chips,
         size_t port_ch0);