textproc/libsass: Update to 3.6.6

- Rearrange Makefile to closer follow Porters Handbook
- Remove hardcoded O2 optimization

Release notes:	https://github.com/sass/libsass/releases/tag/3.6.6

PR:	275948

textproc/libsass/Makefile

@@ -1,6 +1,5 @@
 PORTNAME=	libsass
-DISTVERSION=	3.6.5
-PORTREVISION=	0
+DISTVERSION=	3.6.6
 CATEGORIES=	textproc
 
 MAINTAINER=	nivit@FreeBSD.org
@@ -12,21 +11,19 @@ LICENSE_FILE=	${WRKSRC}/COPYING
 
 USES=		autoreconf compiler:c++11-lib cpe gmake libtool pathfix
 CPE_VENDOR=	sass-lang
-USE_GITHUB=	yes
+PATHFIX_MAKEFILEIN=	GNUmakefile.am
 USE_LDCONFIG=	yes
 
+USE_GITHUB=	yes
+GH_ACCOUNT=	sass
+
+GNU_CONFIGURE=	yes
+MAKEFILE=	GNUmakefile
+INSTALL_TARGET=	install-strip
+
 CONFIGURE_ARGS=	--disable-static
 
-GH_ACCOUNT=	sass
-GNU_CONFIGURE=	yes
-
-INSTALL_TARGET=	install-strip
-
-MAKEFILE=	GNUmakefile
-
-PATHFIX_MAKEFILEIN=	GNUmakefile.am
-
 post-patch:
-	@${ECHO_CMD} "${ECHO_CMD} \"${PORTVERSION}\"" > ${WRKSRC}/version.sh
+	@${ECHO_CMD} "${ECHO_CMD} \"${DISTVERSION}\"" > ${WRKSRC}/version.sh
 
 .include <bsd.port.mk>

textproc/libsass/distinfo

@@ -1,3 +1,3 @@
-TIMESTAMP = 1674776484
-SHA256 (sass-libsass-3.6.5_GH0.tar.gz) = 89d8f2c46ae2b1b826b58ce7dde966a176bac41975b82e84ad46b01a55080582
-SIZE (sass-libsass-3.6.5_GH0.tar.gz) = 342426
+TIMESTAMP = 1703409957
+SHA256 (sass-libsass-3.6.6_GH0.tar.gz) = 11f0bb3709a4f20285507419d7618f3877a425c0131ea8df40fe6196129df15d
+SIZE (sass-libsass-3.6.6_GH0.tar.gz) = 342625

textproc/libsass/files/patch-GNUmakefile.am

@@ -0,0 +1,10 @@
+--- GNUmakefile.am.orig	2023-12-21 08:30:51 UTC
++++ GNUmakefile.am
+@@ -1,6 +1,6 @@ ACLOCAL_AMFLAGS = ${ACLOCAL_FLAGS} -I m4 -I script
+ ACLOCAL_AMFLAGS = ${ACLOCAL_FLAGS} -I m4 -I script
+ 
+-AM_COPT = -Wall -O2
++AM_COPT = -Wall
+ AM_COVLDFLAGS =
+ 
+ if ENABLE_COVERAGE