LU-1032 build: Support --disable-maintainer mode

We add "AM_MAINTAINER_MODE([enable])" to all configure
scripts to allow us to use --disable-maintainer-mode.

By default, without the AM_MAINTAINER_MODE macro, autotools
"maintainer mode" is enabled.  By specifying "enable" we
maintain our previous default behaviour.

Change-Id: I88366ad658795145af80ed96c6e708c385799ffa
Signed-off-by: Christopher J. Morrone <morrone2@llnl.gov>
Reviewed-on: http://review.whamcloud.com/5423


Tested-by: Hudson
Reviewed-by: Faccini Bruno <bruno.faccini@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Prakash Surya <surya1@llnl.gov>
Reviewed-by: Brian J. Murrell <brian.murrell@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>

configure.ac

@@ -13,7 +13,7 @@ LC_CONFIG_SRCDIR
 AC_CANONICAL_SYSTEM
 
 AM_INIT_AUTOMAKE([1.10 tar-ustar -Wno-portability])
-# AM_MAINTAINER_MODE
+AM_MAINTAINER_MODE([enable])
 
 AC_PROG_CC
 

ldiskfs/configure.ac

@@ -12,6 +12,7 @@ AC_CONFIG_MACRO_DIR([config])
 AC_CANONICAL_SYSTEM
 
 AM_INIT_AUTOMAKE([1.10 tar-ustar -Wno-portability])
+AM_MAINTAINER_MODE([enable])
 
 AC_PROG_CC
 

libsysio/configure.in

@@ -13,6 +13,7 @@ case "$host_os" in
 esac
 
 AM_INIT_AUTOMAKE([subdir-objects 1.9 tar-ustar])
+AM_MAINTAINER_MODE([enable])
 AC_PROG_CC
 AM_PROG_CC_C_O