Move ReferenceStack to common package

Author: fangerer

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/capi/CApiContext.java

@@ -51,6 +51,7 @@
 import java.util.Objects;
 import java.util.logging.Level;
 
+import com.oracle.graal.python.builtins.objects.cext.common.ReferenceStack;
 import org.graalvm.collections.EconomicMap;
 
 import com.oracle.graal.python.PythonLanguage;

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/capi/ReferenceStack.java renamed to graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/common/ReferenceStack.java

@@ -38,7 +38,7 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-package com.oracle.graal.python.builtins.objects.cext.capi;
+package com.oracle.graal.python.builtins.objects.cext.common;
 
 import java.lang.reflect.Array;
 import java.util.Arrays;