x300_dboard_iface: added UHD_UNUSED() macro to unused parameters in set_clock_enabled()

* Removes GCC warning about unused parameters
cbx: Fixed LO FRAC truncation
usrp: don't print duplicate GPSDO detection messages
uhd_dump: use LIBS instead of LDFLAGS

This allows distro override for LDFLAGS and doesn't break the build process.

Signed-off-by: Jaroslav Škarvada <jskarvad@redhat.com>
chdr-dissector: fix wireshark-1.12 detection

Signed-off-by: Jaroslav Škarvada <jskarvad@redhat.com>
uhd: Added an operator/ for (fs_path, size_t)

This is useful when constructing property tree paths.
With this path, the following code would be valid:

size_t mb_index = 0;
fs_path mb_root = "/mboards";
mb_root = mb_root / mb_index;

This is a shortcut for the (in UHD very common)

mb_root = mb_root / boost::lexical_cast<std::string(mb_index);
sbx: Fixed logging string (showed TX instead of RX)
uhd: Fixed logging bug (#476) -- UHD logging has unexplained effect on packet loss.
- Removed logging from radio_ctrl_core_3000
- Changed logging facility to prevent type conversion when message is not logged
x300: Added output sync for DAC reference clocks
fpga: Multiple X300 FPGA bugfixes and enhancements

- Fixed 10GigE firmware communication issues and sequence errors for TX
- Multiple changes to help ease timing closure
- Cleaned up build scripts
- Switched to Xilinx ISE 14.7 as the default build tool for X300
docs: Changed Xilinx ISE version from 14.4 to 14.7
Updated ChangeLog for 3.7.3
Updated images URL for 3.7.3RC1
B200: added support for reading the exact product name from EEPROM for B200 and B210
x300:  added reset and resync of ADCs and DACs when changing reference clock
x300:  Reverted back to no analog delay for DAC ref clocks
uhd: Switched lock_guards header to locks.hpp
Updated Changelog for 3.7.3
Updated version string for Release 3.7.3
Updated images archive for Release 3.7.3