Move tests to the correct place

test/CodeGen/MIR is for testing the MIR parser/printer. Tests for passes
and targets belong to test/CodeGen/TARGETNAME.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@322925 91177308-0d34-0410-b5e6-96231b3b80d8
19 files changed