[libomptarget] x86 offloading fails map_back_race.cpp intermittently

[ronlieb]

Summary

suppress test for x86 offloading , intermittent failures

[jdoerfert]

LG, we need an issue and look into this.

[ronlieb]

https://github.com/llvm/llvm-project/issues/54618

[Meinersbur]

The test also fails for CUDA:

https://lab.llvm.org/staging/#/builders/155/builds/3355
https://lab.llvm.org/staging/#/builders/154/builds/2549

openmp/libomptarget/test/mapping/map_back_race.cpp

 // RUN: %libomptarget-compilexx-and-run-generic
 
 // Taken from https://github.com/llvm/llvm-project/issues/54216
 
+
+// UNSUPPORTED: x86_64-pc-linux-gnu
+// UNSUPPORTED: x86_64-pc-linux-gnu-newDriver
+
 #include <algorithm>
 #include <cstdlib>
 #include <iostream>
 
 bool almost_equal(float x, float gold, float rel_tol = 1e-09,
                   float abs_tol = 0.0) {
   return std::abs(x - gold) <=
          std::max(rel_tol * std::max(std::abs(x), std::abs(gold)), abs_tol);