Merge pull request swiftlang#30 from ianpartridge/gitignore

Add .gitignore for tests

tests/.gitignore

@@ -0,0 +1,40 @@
+*.o
+*.lo
+*.la
+.libs
+bsdtestharness
+dispatch
+dispatch_after
+dispatch_api
+dispatch_apply
+dispatch_c99
+dispatch_cascade
+dispatch_concur
+dispatch_context_for_key
+dispatch_data
+dispatch_debug
+dispatch_drift
+dispatch_group
+dispatch_io
+dispatch_io_net
+dispatch_overcommit
+dispatch_pingpong
+dispatch_plusplus
+dispatch_priority
+dispatch_priority2
+dispatch_queue_finalizer
+dispatch_read
+dispatch_read2
+dispatch_readsync
+dispatch_sema
+dispatch_starfish
+dispatch_suspend_timer
+dispatch_timer
+dispatch_timer_bit31
+dispatch_timer_bit63
+dispatch_timer_set_time
+dispatch_timer_short
+dispatch_timer_timeout
+dispatch_vnode
+leaks-wrapper
+