maint: bootstrap: sync a tiny change from gnulib

* bootstrap: rename variable to sync with gnulib: s/\$depth/$shallow/

diff --git a/bootstrap b/bootstrap
index 27e4ec2..3709ce6 100755 (executable)
--- a/bootstrap
+++ b/bootstrap
@@ -359,8 +359,8 @@ case ${GNULIB_SRCDIR--} in
 
     trap cleanup_gnulib 1 2 13 15
 
-    git clone --help|grep depth > /dev/null && depth='--depth 2' || depth=
-    git clone $depth git://git.sv.gnu.org/gnulib ||
+    git clone --help|grep depth > /dev/null && shallow='--depth 2' || shallow=
+    git clone $shallow git://git.sv.gnu.org/gnulib ||
       cleanup_gnulib
 
     trap - 1 2 13 15