Rename code-completion test to actually make sense

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89195 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Index/complete-property-list.m b/test/Index/complete-protocols.m
similarity index 100%
rename from test/Index/complete-property-list.m
rename to test/Index/complete-protocols.m