Fix lm4 flash execute permissions
Merge branch 'master' of https://github.com/machinaut/F4OS into machinaut-master
Update to kconfig-frontends-3.9.0.0

This brings kconfig to the latest version.  Unfortunately, the build
system won't force a rebuild of the kconfig frontends.  Go to
tools/kconfig-frontends and `make clean` then rebuild F4OS to rebuild
all of the kconfig tools.
Update readme
Merge branch 'kconfig-3.9'
Remove trailing whitespace
More trailing whitespace
Add history command to shell