Light-HLS 1.1 (LLVM-11)

What's Changed

1. modify headers/APIs/data structures to be compatible with LLVM 11
2. fix bugs in IR/SourceCode mapping, redundant instruction removing, and memory access analysis
3. enable user-enforced loop unrolling
4. support more complex designs (more complex loops)

New Contributors

• @zslwyuan made their first contribution in #5

Full Changelog: https://github.com/zslwyuan/Light-HLS/commits/Light-HLS-1.1