Failures to start applications during build is not recorded as an issue on linux

When applications used during a built fail to start on linux this is not recognized as an issue. This output is generated on stderr when e.g. a required library is not found:

/home/qt5-stable/bin/uic: error while loading shared libraries: libicui18n.so.52: cannot open shared object file: No such file or directory

Add a Os specific parser for linux that catches these.