build: Enable automake's subdir-objects option

We can get rid of autogen.des' egrep command used to silence this
warning too. In fact we can even remove the subshell and simply
call autoreconf directly. The problem with egrep is the loss of
a meaningful exit status for the autoreconf invocation.

I also enabled autoreconf's verbose output.

autogen.des

@@ -22,8 +22,8 @@ else
 	DST="--prefix=/opt/varnish --mandir=/opt/varnish/man"
 fi
 
-rm -f configure
-(cd $SRCDIR && autoreconf -i 2>&1 | egrep -v "(subdir-objects|is in a subdirectory)")
+rm -f $SRCDIR/configure
+autoreconf -i -v $SRCDIR
 
 # autoconf prior to 2.62 has issues with zsh 4.2 and newer
 CONFIG_SHELL=/bin/sh

configure.ac

@@ -19,7 +19,7 @@ AC_CANONICAL_SYSTEM
 AC_LANG(C)
 
 AM_MAINTAINER_MODE([disable])
-AM_INIT_AUTOMAKE([1.11 foreign color-tests parallel-tests])
+AM_INIT_AUTOMAKE([1.11 foreign color-tests parallel-tests subdir-objects])
 AM_SILENT_RULES([yes])
 AC_DISABLE_STATIC
 AC_PROG_LIBTOOL