[clang] [llvm] [mlir] [OpenMP][Mappers] Fix ref-count tracking for maps inserted by mappers. (PR #177059)

[Jan Patrick Lehr via cfe-commits]

jplehr wrote:

This fails on our buildbots https://lab.llvm.org/staging/#/builders/105/builds/40930 and https://lab.llvm.org/staging/#/builders/64/builds/20028


https://github.com/llvm/llvm-project/pull/177059