Update to mpc-1.2.1.

ports/libmpc/libmpc.patch

@@ -1,12 +0,0 @@
-diff -Paur --no-dereference -- libmpc.upstream/config.sub libmpc/config.sub
---- libmpc.upstream/config.sub
-+++ libmpc/config.sub
-@@ -1373,7 +1373,7 @@
- 	      | -hpux* | -unos* | -osf* | -luna* | -dgux* | -auroraux* | -solaris* \
- 	      | -sym* | -kopensolaris* | -plan9* \
- 	      | -amigaos* | -amigados* | -msdos* | -newsos* | -unicos* | -aof* \
--	      | -aos* | -aros* \
-+	      | -aos* | -aros* | -sortix* \
- 	      | -nindy* | -vxsim* | -vxworks* | -ebmon* | -hms* | -mvs* \
- 	      | -clix* | -riscos* | -uniplus* | -iris* | -rtu* | -xenix* \
- 	      | -hiux* | -386bsd* | -knetbsd* | -mirbsd* | -netbsd* \

ports/libmpc/libmpc.port

@@ -1,11 +1,12 @@
 NAME=libmpc
 BUILD_LIBRARIES='libgmp libmpfr'
-VERSION=1.0.3
+VERSION=1.2.1
 DISTNAME=mpc-$VERSION
 COMPRESSION=tar.gz
 ARCHIVE=$DISTNAME.$COMPRESSION
-SHA256SUM=617decc6ea09889fb08ede330917a00b16809b8db88c29c31bfbb49cbf88ecc3
+SHA256SUM=17503d2c395dfcf106b622dc142683c1199431d095367c6aacba6eec30340459
 UPSTREAM_SITE=https://ftp.gnu.org/gnu/mpc
 UPSTREAM_ARCHIVE=$ARCHIVE
+LICENSE=LGPL-3.0-or-later
 BUILD_SYSTEM=configure
 POST_INSTALL=tix-eradicate-libtool-la