The new build script does not support ninja anymore, and we haven't
been building bare-metal arm targets for long. This patch removes
now-obsolete dependencies from install scripts.
This can also help to reduce the load on Travis CI (as it keeps
installing dependencies for each build job over and over again).
JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu