Improve build shell scripts.

...rg/bigbluebutton/app/screenshare/red5/Red5AppService.java

...enshare/jws/native-libs/ffmpeg-linux-x86/h264/sign-jar.sh

...enshare/jws/native-libs/ffmpeg-linux-x86/svc2/sign-jar.sh

...hare/jws/native-libs/ffmpeg-linux-x86_64/h264/sign-jar.sh

...hare/jws/native-libs/ffmpeg-linux-x86_64/svc2/sign-jar.sh

...are/jws/native-libs/ffmpeg-macosx-x86_64/h264/sign-jar.sh

...are/jws/native-libs/ffmpeg-macosx-x86_64/svc2/sign-jar.sh

...share/jws/native-libs/ffmpeg-windows-x86/h264/sign-jar.sh

...share/jws/native-libs/ffmpeg-windows-x86/svc2/sign-jar.sh

...re/jws/native-libs/ffmpeg-windows-x86_64/h264/sign-jar.sh

...re/jws/native-libs/ffmpeg-windows-x86_64/svc2/sign-jar.sh

bbb-screenshare/jws/native-libs/unsigned-jars/sign-ffmpeg.sh

bbb-screenshare/jws/webstart/build.sh

bbb-screenshare/jws/webstart/deploy.sh

bbb-video/deploy.sh

...eo/src/main/webapp/WEB-INF/bigbluebutton-video.properties

bbb-voice/deploy.sh

...luebutton/voiceconf/red5/media/SipToFlashAudioStream.java

...e/src/main/java/org/red5/app/sip/stream/ListenStream.java

...oice/src/main/webapp/WEB-INF/bigbluebutton-sip.properties