[gtk+/gtk-3-22] wayland: Use portable sed syntax in gdk/wayland/Makefile.am

[Ting-Wei Lan <lantw src gnome org>]

commit b68e55ecce38dec47c3f9119e603b81773e5294a
Author: Ting-Wei Lan <lantw src gnome org>
Date:   Sun Jan 7 02:57:38 2018 +0800

    wayland: Use portable sed syntax in gdk/wayland/Makefile.am
    
    Replace non-portable \<, \>, \+ with \(, \), \{, \} to avoid build
    failure on systems not using GNU sed.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=792279

 gdk/wayland/Makefile.am |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gdk/wayland/Makefile.am b/gdk/wayland/Makefile.am
index cccb572..0b2d4ce 100644
--- a/gdk/wayland/Makefile.am
+++ b/gdk/wayland/Makefile.am
@@ -80,11 +80,11 @@ libgdkwaylandinclude_HEADERS =                      \
 .SECONDEXPANSION:
 
 define protostability
-$(shell echo $1 | sed 's/.*\(\<unstable\>\|\<stable\>\).*/\1/')
+$(shell echo $1 | sed 's/.*-\(\(un\)\{0,1\}stable\)-.*/\1/')
 endef
 
 define protoname
-$(shell echo $1 | sed 's/\([a-z\-]\+\)-[a-z]\+-v[0-9]\+/\1/')
+$(shell echo $1 | sed 's/\([a-z\-]\{1,\}\)-[a-z]\{1,\}-v[0-9]\{1,\}/\1/')
 endef
 
 %-protocol.c : $(WAYLAND_PROTOCOLS_DATADIR)/$$(call protostability,$$*)/$$(call protoname,$$*)/$$*.xml