[gnome-builder] doc: use recursive instead of archive

[Christian Hergert <chergert src gnome org>]

commit 74218f0da48b7b81d88249db1d1feda06a731808
Author: Christian Hergert <chergert redhat com>
Date:   Tue Mar 14 01:53:34 2017 -0700

    doc: use recursive instead of archive
    
    We don't want to copy immutable items for distcheck.

 doc/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/doc/Makefile.am b/doc/Makefile.am
index c76893a..47b568c 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -63,7 +63,7 @@ dist-hook:
 install-data-hook:
        if test -d "$(srcdir)/html"; then                            \
                $(MKDIR_P) "$(DESTDIR)$(docdir)/html" ;              \
-               cp -a $(srcdir)/html/* "$(DESTDIR)$(docdir)/html/" ; \
+               cp -R --no-preserve=all $(srcdir)/html/* "$(DESTDIR)$(docdir)/html/" ; \
        fi
 
 uninstall-local: