support: remove stray commenting out of stderr redirect
linuxdvb: possible HW race condition, LNB might not switch LO before FE locks
linuxdvb: move FE status message from trace to debug on change

This could still be spammy if the signal isn't clean and keeps going
in and out. But that's just tough luck I guess!
linuxdvb: work around bug in gcc <4.6. Fixes #1869
mpegts: fix some minor compilation issues on older gcc
misc: add qsort_r replacement for glibc < 2.8. Fixes #1871
build: force setting of -march in Makefile