update to libsass-3.6.4

this release seems to resolve the hangs witness with previous (uncommitted)
version since 3.6.1.

www/libsass/Makefile

@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.14 2019/11/13 19:38:39 jasper Exp $
+# $OpenBSD: Makefile,v 1.15 2020/05/14 18:11:07 jasper Exp $
 
 # www/ruby-sassc contains an embedded version of libsass, please
 # update it if there are security patches to libsass
@@ -7,11 +7,10 @@ COMMENT =		C/C++ implementation of a Sass compiler
 
 GH_ACCOUNT =		sass
 GH_PROJECT =		libsass
-GH_TAGNAME =		3.6.1
+GH_TAGNAME =		3.6.4
 EPOCH =			0
-REVISION =		1
 
-SHARED_LIBS +=  sass                      0.0 # 0.0
+SHARED_LIBS +=  sass                      0.1 # 0.0
 
 MAINTAINER =		Jasper Lievisse Adriaanse <jasper@openbsd.org>
 

www/libsass/distinfo

@@ -1,2 +1,2 @@
-SHA256 (libsass-3.6.1.tar.gz) = GNboZrokMMzK4lUfOErKJTqEWSxpLOcUZVDx1PJzt9c=
-SIZE (libsass-3.6.1.tar.gz) = 333609
+SHA256 (libsass-3.6.4.tar.gz) = +UhNmm32BXbnkVZuqy91epf9QU/OAd1B/AppPqXbKIk=
+SIZE (libsass-3.6.4.tar.gz) = 338519

www/libsass/patches/patch-Makefile

@@ -1,16 +0,0 @@
-$OpenBSD: patch-Makefile,v 1.3 2020/04/16 21:06:54 cwen Exp $
-
-Drop concurrent compilation, avoid swapping on low memory archs
-From: https://github.com/sass/libsass/pull/2977
-
-Index: Makefile
---- Makefile.orig
-+++ Makefile
-@@ -19,7 +19,6 @@ ifndef COVERAGE
-   CFLAGS   += -O2
-   CXXFLAGS += -O2
-   LDFLAGS  += -O2
--  MAKEFLAGS += "-j 0"
- else
-   CFLAGS   += -O1 -fno-omit-frame-pointer
-   CXXFLAGS += -O1 -fno-omit-frame-pointer