Kingst LA1010 support for Sigrok

To enable Kingst LA-1010 support in libsigrok there need perform these steps:

1. Get libsigrok sources (see docs for libsigrok).
2. Copy directory 'kingst-la1010' to subdirectory 'src/hardware' in libsigrok source directory.
3. Apply patches 'Makefile.am.patch' and 'configure.ac.patch' to corresponding files in libsigrok source directory.
4. Build libsigrok (see docs for libsigrok).
5. Use Python script 'fwextractor.py' for extracting firmwares from KingsVIS (Python v3.x). Firmwares will be extracted to current directory.
6. Copy firmwares to directory '~/.local/share/sigrok-firmware/'. Kingst-LA1010 uses the firmware 'fw01A2.hex' or 'fw01A2.fw' and the firmware 'LA1010A_0.bitstream' (after extracting may not have extension '.bitstream' -- must be renamed). If You answer 'y' when executing the script 'fwextractor.py' all operations (rename, format convertation etc.) will be performed.

Extracting firmwares is avalible from KingsVIS executable which are provided with new version of Kingst software for Linux platform (tested on version 3.4.1).