Add vi swap files to .gitignore

BUG=none
R=dcarney@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/181263002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19559 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
A64: Decoder should not inherit from DecoderVisitor

BUG=none
R=ulan@chromium.org, rodolph.perfetta@arm.com
LOG=n

Review URL: https://codereview.chromium.org/177073013

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19560 ce2b1a6d-e550-0410-aec6-3dcde31c8c00