Don't build libdecor demos, add generated files to .gitignore

1) We don't need to build the libdecor demo programs for FLTK.

2) The Wayland build process generates some source and header files
   in the main src/ directory. These files are now ignored by git.

.gitignore

@@ -83,7 +83,18 @@ etc/FLTKConfig.cmake
 /src/*.sav
 /src/*.dylib
 
-# /test/
-# see test/.gitignore
+# Wayland build artifacts (generated files)
+
+src/text-input-client-protocol.h
+src/text-input-protocol.c
+src/xdg-decoration-client-protocol.h
+src/xdg-decoration-protocol.c
+src/xdg-shell-client-protocol.h
+src/xdg-shell-protocol.c
+
+# Wayland demo programs (no longer being built)
+
+# libdecor/build/demo
+# libdecor/build/egl
 
 **/.DS_Store

libdecor/build/Makefile

@@ -38,7 +38,8 @@ Linux_NOPIE = -no-pie
 FreeBSD_NOPIE =
 NOPIE = ${${UNAME}_NOPIE}
 
-all : demo $(GLWLDEMO)
+# Don't build libdecor demo programs automatically: demo $(GLWLDEMO)
+all : $(OBJECTS)
 
 depend:
 	: echo "libdecor/build: make depend..."