sane_backends: make CFLAGS consistent for all architectures (no debuginfo)

media-gfx/sane_backends/sane_backends-1.3.1.recipe

@@ -16,7 +16,7 @@ documentation."
 HOMEPAGE="http://www.sane-project.org"
 COPYRIGHT="David Mosberger-Tang, Andy Beck"
 LICENSE="GNU LGPL v2"
-REVISION="2"
+REVISION="3"
 SOURCE_URI="https://gitlab.com/sane-project/backends/-/archive/$portVersion/backends-$portVersion.tar.gz"
 CHECKSUM_SHA256="cc8796701015def1c598f97962a70d63957b9786841391cc412a606568b42b96"
 SOURCE_DIR="backends-$portVersion"
@@ -92,6 +92,8 @@ BUILD()
 {
 	if [ $effectiveTargetArchitecture == 'x86' ]; then
 		export CFLAGS="-DTIFF_DISABLE_DEPRECATED -O2"
+	else
+		export CFLAGS="-O2"
 	fi
 
 	./autogen.sh