Add blueprint, kati, and soong subdirectories to .gitignore so nothing gets committed there when new subprojects are added to the manifest. Change-Id: I888b94a89c87d99c8d28e8abd07a830f9cd86702
Also added .swp to .gitignore. Change-Id: I51700f55230facde2e46574aa039d45ae5b29cdf
Change-Id: Ie8877ca9c1152681433a638a5e4d20948326f7ca