Utilize the new "all" ARCHITECTURES keyword in most recipes. (#6189)

x86_64 is used as a baseline: the "x86_64" entry, whatever status it has,
is transformed into "all", and then the other entries in ARCHITECTURES
either dropped or rearranged appropriately.

games-emulation/mupen64plus/mupen64plus-2.5.9.recipe

@@ -23,7 +23,7 @@ PATCHES="mupen64plus-$portVersion.patchset"
 PATCHES_2="mupen64plus_qt-$guiVersion.patchset"
 ADDITIONAL_FILES="mupen64plus.rdef.in"
 
-ARCHITECTURES="!x86_gcc2 x86_64"
+ARCHITECTURES="all !x86_gcc2"
 SECONDARY_ARCHITECTURES="x86"
 
 M64P_COMPONENTS="core ui-console audio-sdl input-sdl rsp-hle video-rice video-glide64mk2"
@@ -82,7 +82,7 @@ BUILD_PREREQUIRES="
 	"
 
 BUILD()
-{	
+{
 	APP_DIR="$appsDir/Mupen64Plus/"
 	PARAMS="\
 		PLUGINDIR=$APP_DIR/plugins \
@@ -142,7 +142,7 @@ INSTALL()
 		-e "s|@MIDDLE@|$MIDDLE|" \
 		-e "s|@MINOR@|$MINOR|" \
 		-e "s|@LONG_INFO@|$LONG_INFO|" \
-		$portDir/additional-files/mupen64plus.rdef.in > mupen64plus.rdef	
+		$portDir/additional-files/mupen64plus.rdef.in > mupen64plus.rdef
 	addResourcesToBinaries mupen64plus.rdef $APP_DIR/bin/Mupen64Plus
 
 	local APP_SIGNATURE="application/x-vnd.mupen64plus-qt"
@@ -155,7 +155,7 @@ INSTALL()
 		-e "s|@MIDDLE@|$MIDDLE|" \
 		-e "s|@MINOR@|$MINOR|" \
 		-e "s|@LONG_INFO@|$LONG_INFO|" \
-		$portDir/additional-files/mupen64plus.rdef.in > mupen64plus-qt.rdef	
+		$portDir/additional-files/mupen64plus.rdef.in > mupen64plus-qt.rdef
 	addResourcesToBinaries mupen64plus-qt.rdef $APP_DIR/Mupen64Plus
 
 	addAppDeskbarSymlink $APP_DIR/Mupen64Plus