Add required dependencies for .deb

direct/src/p3d/DeploymentTools.py

@@ -221,6 +221,7 @@ class Installer:
         controlfile.write("Priority: optional\n")
         controlfile.write("Architecture: %s\n" % arch)
         controlfile.write("Description: %s\n" % self.fullname)
+        controlfile.write("Depends: libc6 libgcc1 libstdc++6\n")
         controlfile.close()
         Filename(tempdir, "usr/bin/").makeDir()
         self.standalone.build(Filename(tempdir, "usr/bin/" + self.shortname.lower()), platform)