gobject-introspection: build sequentially when using the Fujitsu compiler. (#17092)

var/spack/repos/builtin/packages/gobject-introspection/package.py

@@ -73,3 +73,7 @@ def install(self, spec, prefix):
 
     def setup_build_environment(self, env):
         env.set('SPACK_SBANG', "%s/bin/sbang" % spack_root)
+
+    @property
+    def parallel(self):
+        return not self.spec.satisfies('%fj')