COMPMID-3490 - Nightly fails: android armv7 microtask error - part2

Change-Id: I6555728a9d39485c4d9fb9b75024744f3454c8e5
Signed-off-by: Manuel Bottini <manuel.bottini@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3234
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/tests/validation/reference/GEMM.cpp b/tests/validation/reference/GEMM.cpp
index 63c7f53..f7a1718 100644
--- a/tests/validation/reference/GEMM.cpp
+++ b/tests/validation/reference/GEMM.cpp
@@ -111,7 +111,7 @@
     const int c_stride_z = N * M;
     const int c_stride_w = N * M * D;
 
-#if defined(_OPENMP)
+#if defined(_OPENMP) && !( defined(__arm__) && defined(__ANDROID__))
     #pragma omp parallel for collapse(2)
 #endif /* _OPENMP */
     for(int w = 0; w < W; ++w)