gifsicle: bump to 1.91, strip runtimes. (#2553)

media-gfx/gifsicle/gifsicle-1.91.recipe

@@ -6,11 +6,11 @@ interlacing on and off; add transparency; add delays, disposals, and looping \
 to animations; add and remove comments; flip and rotate; optimize animations \
 for space; change images' colormaps; and other things."
 HOMEPAGE="http://www.lcdf.org/gifsicle/"
-COPYRIGHT="1997-2014 Eddie Kohler"
+COPYRIGHT="1997-2018 Eddie Kohler"
 LICENSE="GNU GPL v2"
 REVISION="1"
 SOURCE_URI="http://www.lcdf.org/gifsicle/gifsicle-$portVersion.tar.gz"
-CHECKSUM_SHA256="2d73b096752d58fa604cea559199aa6f55b45a3ec833898f94ff7997d22b834d"
+CHECKSUM_SHA256="0a4ee602aa244cdcdd86a250a6b39c94d8343cf526b8fae862d8a0efc337a800"
 
 ARCHITECTURES="x86_gcc2 x86 x86_64"
 
@@ -31,6 +31,7 @@ BUILD_PREREQUIRES="
 	cmd:gcc
 	cmd:make
 	cmd:perl
+	cmd:sed
 	"
 
 PATCH()
@@ -41,12 +42,17 @@ PATCH()
 BUILD()
 {
 	runConfigure ./configure
+	if [ "$effectiveTargetArchitecture" = x86_gcc2 ]; then
+		# avoid undefined reference to __sync_add_and_fetch
+		# from function scale_image_threaded in src/xform.c
+		sed -i -e "/HAVE___SYNC_ADD_AND_FETCH/ s/1/0/" config.h
+	fi
 	make
 }
 
 INSTALL()
 {
-	make install
+	make install-strip
 }
 
 TEST()