Update build_deb_package.sh

Author: Tim Schneeberger

meta/build_deb_package.sh

@@ -30,7 +30,7 @@ GenericName=Audio effect processor
 Comment=JamesDSP for Linux
 Keywords=equalizer;audio;effect
 Categories=AudioVideo;Audio
-Exec=jamesdsp
+Exec=/usr/bin/jamesdsp
 Icon=/usr/share/pixmaps/jamesdsp.png
 StartupNotify=false
 Terminal=false
@@ -49,4 +49,7 @@ Description: JamesDSP for Linux
 Homepage: https://github.com/Audio4Linux/JDSP4Linux
 EOT
 
+chown root:root $debname"/usr/share/applications/jamesdsp.desktop"
+chmod +x $debname"/usr/bin/jamesdsp"
+
 dpkg-deb --build $debname