science/sigrok-firmware-fx2lafw: Update to version 0.1.7

• Add firmware for the YiXingDianZi MDSO (VID/PID: 1D50:608E).
• Sainsmart DDS120: Fix the 1kHz reference signal.
• Hantek 6022BL: Fix the voltage range selection (bug #1360).
• Allow LA captures at 48MHz samplerate (as long as bus conditions permit).
• Updated build requirement: sdcc >= 3.4.0 (bug #1326).
• Fix a build issue with sdcc >= 3.9.0 (bug #1404).
• Bump the firmware version (major.minor) to 1.4. This version is backwards-compatible and doesn't require host-side (libsigrok) changes.