[PM] Teach the module-to-function adaptor to not run function passes

[PM] Teach the module-to-function adaptor to not run function passes
over declarations.

This is both quite unproductive and causes things to crash, for example
domtree would just assert.

I've added a declaration and a domtree run to the basic high-level tests
for the new pass manager.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227724 91177308-0d34-0410-b5e6-96231b3b80d8