improve clean target
tree926063b4c828fb242f5117d7b703528a2987148d
-rw-r--r-- 1816 .defconfig
-rw-r--r-- 190 .gitignore
-rw-r--r-- 6304 Config.in
-rw-r--r-- 15254 Makefile
-rw-r--r-- 432 TODO
drwxr-xr-x - docs
drwxr-xr-x - package
drwxr-xr-x - project
drwxr-xr-x - target
drwxr-xr-x - toolchain