.gitignore: Properly ignore KDevelop files

Change-Id: I1410242e4d1995baedd5d3a001f86619e729db98
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/4268
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)
1 file changed