kerneltoolchains: Present possible versions in Usage
kerneltoolchains: Present possible versions in Usage

Change-Id: I5ca50b3f0c2fbeb6d19407bf6c77888b2fabf7ae
Signed-off-by: Adrian DC <01fb3892f39957945220431e7409156544d2f041@gmail.com>

AdrianDC/android_development_shell_tools,AdrianDC/android_development_shell_tools