maint: sync up required autoconf version in bootstrap.conf

* bootstrap.conf ($buildreq): Require autoconf 2.64, not 2.62.  This is
consistent with what is required by AC_PREREQ in configure.ac.

diff --git a/bootstrap.conf b/bootstrap.conf
index bb414ef..41b9cc2 100644 (file)
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -307,7 +307,7 @@ gnulib_tool_option_extras="--tests-base=gnulib-tests --with-tests --symlink\
 
 # Build prerequisites
 buildreq="\
-autoconf   2.62
+autoconf   2.64
 automake   1.11.1
 autopoint  -
 bison      -