The default SHELL isn't POSIX on some systems, such as Solaris. Use
the one Autoconf chooses instead of the default.
Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
# GNUmakefile.in: Makefile template for configure
#
# Known contributors to this file:
-# Markus Armbruster, 2005-2009
+# Markus Armbruster, 2005-2020
#
# The real meat is in Make.mk, which see.
INSTALL_PROGRAM := @INSTALL_PROGRAM@
NROFF := @NROFF@
RANLIB := @RANLIB@
+SHELL := @SHELL@
prefix := @prefix@
exec_prefix := @exec_prefix@