update lang/sbcl to 2.1.7

this updates sbcl to latest version 2.1.7

no issue, tested on amd64 with threads and not thread flavors

Index: Makefile
===================================================================
RCS file: /home/reposync/ports/lang/sbcl/Makefile,v
retrieving revision 1.46
diff -u -p -r1.46 Makefile
--- Makefile 28 May 2021 16:23:31 -0000 1.46
+++ Makefile 3 Aug 2021 08:33:31 -0000
@@ -25,7 +25,7 @@ USE_WXNEEDED = Yes

COMMENT= compiler and runtime system for ANSI Common Lisp

-V = 2.1.4
+V = 2.1.7
DISTNAME= sbcl-${V}-source
PKGNAME= sbcl-${V}
WRKDIST= ${WRKDIR}/sbcl-${V}
Index: distinfo
===================================================================
RCS file: /home/reposync/ports/lang/sbcl/distinfo,v
retrieving revision 1.20
diff -u -p -r1.20 distinfo
--- distinfo 28 May 2021 16:23:31 -0000 1.20
+++ distinfo 3 Aug 2021 08:33:43 -0000
@@ -1,2 +1,2 @@
-SHA256 (sbcl-2.1.4-source.tar.bz2) = mSYOI0b80irlVG4VuvUImdyzt1psdMx8yEk3iJnvvRE=
-SIZE (sbcl-2.1.4-source.tar.bz2) = 6550812
+SHA256 (sbcl-2.1.7-source.tar.bz2) = EmBvFTgyriAD0hYqazqFGl6Jacy791ONKw+zLRfqHcY=
+SIZE (sbcl-2.1.7-source.tar.bz2) = 6622050
Index: pkg/PLIST
===================================================================
RCS file: /home/reposync/ports/lang/sbcl/pkg/PLIST,v
retrieving revision 1.12
diff -u -p -r1.12 PLIST
--- pkg/PLIST 13 May 2019 12:58:58 -0000 1.12
+++ pkg/PLIST 3 Aug 2021 17:18:01 -0000
@@ -21,6 +21,8 @@ lib/sbcl/contrib/sb-executable.asd
lib/sbcl/contrib/sb-executable.fasl
lib/sbcl/contrib/sb-gmp.asd
lib/sbcl/contrib/sb-gmp.fasl
+lib/sbcl/contrib/sb-graph.asd
+lib/sbcl/contrib/sb-graph.fasl
lib/sbcl/contrib/sb-grovel.asd
lib/sbcl/contrib/sb-grovel.fasl
lib/sbcl/contrib/sb-introspect.asd