tree 6d35cfad072f2ce3453341236e6aec0be60dcc4a
parent e89841d5ea7ed5aa3a2a3597fa07cb7995b96a0d
author Fabio Utzig <utzig@apache.org> 1546862060 -0200
committer Fabio Utzig <utzig@utzig.org> 1547022535 -0200

imgtool save to format of given output filename

Updates imgtool to infer, based on output image filename, which format
should be use for output file. Filenames that end with extension `.hex`
are saved in Intel HEX, otherwise saves a binary image.

Signed-off-by: Fabio Utzig <utzig@apache.org>