DebugIR tests -- lit tests for the line number transform
- simple one-function case
- function-calling case
- external function calling case
- exception throwing case
- vector case

Note: these tests are somewhat coupled to the current format of debug metadata.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181469 91177308-0d34-0410-b5e6-96231b3b80d8