rename empty .gitignore to .empty

When building the rpm package .gitignore is deleted. These files
are necessary in order for saved profiles when building the image
from git repository and from installed rpm package have been
identical.

features.in/build-distro/scripts.d/00-cleanup

@@ -1,4 +1,4 @@
 #!/bin/sh
 # TODO: invent some way to remove this inter-subprofile thing
 
-rm -vf $WORKDIR/{squashcfg.mk,initfs,.gitignore}
+rm -vf $WORKDIR/{squashcfg.mk,initfs,.gitignore,.empty}

sub.in/stage1/scripts.d/01-clean-.empty-stage1

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+rm -f /.image/.empty

sub.in/stage1/scripts.d/01-clean-.gitignore-stage1

@@ -1,3 +0,0 @@
-#!/bin/sh
-
-rm -f /.image/.gitignore

sub.in/stage2/scripts.d/01-clean-.empty-stage2

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+rm -f /.image/.empty

sub.in/stage2/scripts.d/01-clean-.gitignore-stage2

@@ -1,3 +0,0 @@
-#!/bin/sh
-
-rm -f /.image/.gitignore