Workaround failing MacOS CI builds

Building of UMF sometimes fails on MacOS, because of multi-job
compilation of jemalloc built from sources:

install: mkdir /Users/runner/work/unified-memory-framework/unified-memory-framework/build/_deps/jemalloc_targ-build/share: File exists

Add one-job compilation to workaround this error.

Signed-off-by: Lukasz Dorau <[email protected]>

Author: ldorau

.github/workflows/reusable_basic.yml

@@ -496,7 +496,7 @@ jobs:
         ${{matrix.static_hwloc}}
 
     - name: Build UMF
-      run: cmake --build ${{env.BUILD_DIR}} -j $(sysctl -n hw.logicalcpu)
+      run: cmake --build ${{env.BUILD_DIR}} -j $(sysctl -n hw.logicalcpu) || cmake --build ${{env.BUILD_DIR}} -j 1
 
     - name: Test UMF installation and uninstallation
       run: >