drirc: add Spectacle, Falkon to a-sync blacklist

Spectacle is the plasma screenshot utility

Falkon is a KDE web browser that should succeed Konqueror
15 jobs for !609 with master in 10 minutes and 56 seconds (queued for 1 second)
latest detached
Status Job ID Name Coverage
  Containers Build
passed ubuntu #235235

00:00:21

 
  Build+Test
passed autotools #235236

00:10:33

passed meson-clang #235238

00:09:25

passed meson-gallium-clover-llvm #235244

00:06:47

passed meson-gallium-clover-llvm39 #235245

00:06:34

passed meson-gallium-drivers-other #235243

00:08:03

passed meson-gallium-radeonsi #235242

00:06:10

passed meson-gallium-st-other #235246

00:05:06

passed meson-gallium-swr #235237

00:09:10

passed meson-glvnd #235241

00:06:45

passed meson-loader-classic-dri #235240

00:07:05

passed meson-vulkan #235239

00:04:42

passed scons-llvm #235248

00:04:00

passed scons-nollvm #235247

00:06:06

passed scons-swr #235249

00:08:19