Package defaults.lua and symlink libluajit-5.1.so

1. The file defaults.lua needs to be mentioned in LUA_FILES in order to
be packaged by "make customupdate".
2. The problem with the linker not finding libluajit-5.1.so.2 can be
fixed without specifying the shared library in the list of objects (and
static libraries), simply by making a symbolic link. No need to copy a
duplicate.

Conflicts:

	Makefile

Makefile

@@ -96,6 +96,7 @@ K2PDFOPT_CFLAGS=-I$(K2PDFOPTLIBDIR)/willuslib -I$(K2PDFOPTLIBDIR)/k2pdfoptlib -I
 MUPDFLIBS := $(MUPDFLIBDIR)/libfitz.a
 DJVULIBS := $(DJVUDIR)/build/libdjvu/.libs/libdjvulibre.so \
 			$(LIBDIR)/libdjvulibre.so
+DJVULIB :=	$(LIBDIR)/libdjvulibre.so.21
 DJVULIBDIR := $(DJVUDIR)/build/libdjvu/.libs/
 CRENGINELIBS := $(CRENGINEDIR)/crengine/libcrengine.a \
 			$(CRENGINEDIR)/thirdparty/chmlib/libchmlib.a \