lapack: set DPB_PROPERTIES=parallel?

lapack seems happy with a parallel build, and there's quite a time
saving compared to a single-process build. ok to add DPB_PROPERTIES
to tell DPB that it's alright to do that?


Index: Makefile
===================================================================
RCS file: /cvs/ports/math/lapack/Makefile,v
retrieving revision 1.33
diff -u -p -r1.33 Makefile
--- Makefile 11 Mar 2022 19:36:17 -0000 1.33
+++ Makefile 30 Aug 2022 18:52:49 -0000
@@ -1,4 +1,5 @@
COMMENT= library of Fortran linear algebra subroutines
+DPB_PROPERTIES= parallel

VERSION= 3.8.0
DISTNAME= lapack-${VERSION}