build_linux.sh: enable Pipewire (Wayland) and X11 desktop capture (livekit#784)

Author: Be-ing

webrtc-sys/libwebrtc/build_linux.sh

@@ -115,12 +115,12 @@ args="is_debug=$debug  \
   ffmpeg_branding=\"Chrome\" \
   rtc_use_h264=true \
   rtc_use_h265=true \
-  rtc_use_pipewire=false \
+  rtc_use_pipewire=true \
   symbol_level=0 \
   enable_iterator_debugging=false \
   use_rtti=true \
   is_clang=false \
-  rtc_use_x11=false"
+  rtc_use_x11=true"
 
 # generate ninja files
 gn gen "$OUTPUT_DIR" --root="src" --args="${args}"