.gitignore: Add '/' to ignored files in root directory
.gitignore: Add '/' to ignored files in root directory

mdigiorgio/lisa,credp/lisa,credp/lisa,mdigiorgio/lisa,ARM-software/lisa,joelagnel/lisa,arnoldlu/lisa,ARM-software/lisa,ARM-software/lisa,credp/lisa,bjackman/lisa,credp/lisa,ARM-software/lisa,bjackman/lisa,arnoldlu/lisa,joelagnel/lisa