make test name less specific

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134964 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/call-knr-indirect.c b/test/CodeGen/call.c
similarity index 100%
rename from test/CodeGen/call-knr-indirect.c
rename to test/CodeGen/call.c