Make attribute "eaton" to match only files in current directory

Make attribute "eaton" to match only files in current directory

Previously, the attribute was set also for files, where it was not
desired because a file in the subdirectory had the same name a file with
eaton attribute in current directory. An example is
apps/rpp-test-suite/main.c and
apps/rpp-test-suite/src/_tms570_rpp/main.c, where only the former file
should be a part of release.