Fix broken testall.py (NameError: PASS_AGGRESSIVE_DCE)
Fix broken testall.py (NameError: PASS_AGGRESSIVE_DCE)

Commit 2d79cfa43 renamed PASS_AGGRESSIVE_DCE -> PASS_ADCE but missed
an instance in one test.

llvmpy/llvmpy,llvmpy/llvmpy,llvmpy/llvmpy,llvmpy/llvmpy,llvmpy/llvmpy,llvmpy/llvmpy