bootstrap: Force gnulib-tool --libtool option.

This forces the recent gnulib to generate a libgnu.la file.  Otherwise
it appears to default to --no-libtool which doesn't generate one.

diff --git a/bootstrap b/bootstrap
index e861acb..ecaf2c8 100755 (executable)
--- a/bootstrap
+++ b/bootstrap
@@ -74,6 +74,7 @@ xstrtoll
 '
 
 $gnulib_tool                   \
+  --libtool                     \
   --avoid=dummy                        \
   --with-tests                 \
   --m4-base=m4                 \