Adding .gitignore to specify intentionally untracked files to ignore.
Adding .gitignore to specify intentionally untracked files to ignore.

Signed-off-by:Robert Jennings <3915fb8377205924ccc3120e302501c7a259dd7e@linux.vnet.ibm.com>

kamalesh-babulal/powerpc-utils,shenki/powerpc-utils,mdroth/powerpc-utils,tyreld/powerpc-utils,leitao/powerpc-ibm-utils-debian,leitao/powerpc-ibm-utils-debian,mdroth/powerpc-utils,shenki/powerpc-utils,mdroth/powerpc-utils,kamalesh-babulal/powerpc-utils,kamalesh-babulal/powerpc-utils,tyreld/powerpc-utils,shenki/powerpc-utils,tyreld/powerpc-utils,leitao/powerpc-ibm-utils-debian