Partially lift restrictions on number of processes to build Emscripten static library in ci

Author: mcbarton

.github/workflows/emscripten.yml

@@ -705,7 +705,11 @@ jobs:
                 ../
         fi
         os="${{ matrix.os }}"
-        emmake make -j ${{ env.ncpus }} check-cppinterop
+        if [[ "${os}" != macos* ]] ; then
+          emmake make -j ${{ env.ncpus }} check-cppinterop
+        else
+          EMCC_CORES=2 emmake make -j 2 check-cppinterop
+        fi
         cd ./unittests/CppInterOp/
         # Explaination of options for emrun
         # --browser (name of browser on path)