Make it work under linux with gqrx/gr-osmosdr#223

vladisslav2011 wants to merge 2 commits intoik1xpv:masterik1xpv/ExtIO_sddc:masterfrom

vladisslav2011:linux_fixes_upstreamvladisslav2011/ExtIO_sddc:linux_fixes_upstreamCopy head branch name to clipboard