[wip/py-quadprog] fix SYSTEM_SEARCH for python 3

py-quadprog/depend.mk

@@ -21,7 +21,7 @@ DEPEND_ABI.py-quadprog?=	${PKGTAG.python-}quadprog>=0.1.6
 DEPEND_DIR.py-quadprog?=	../../wip/py-quadprog
 
 SYSTEM_SEARCH.py-quadprog=\
-  '${PYTHON_SITELIB}/quadprog${PYTHON_SOABI}.so'
+  '${PYTHON_SITELIB}/quadprog${PYTHON_EXT_SUFFIX}'
 
 endif # PY_QUADPROG_DEPEND_MK --------------------------------------------------