autoconf: Fix call to AC_CONFIG_AUX_DIR.

The `pwd` parameter to AC_CONFIG_AUX_DIR is unnecessary, the default
value is $srcdir.

Additionally remove the AC_REVISION call.  It only added a comment and
is pointless without SVN tag replacements.

Change-Id: I99299a3217f095bddcb2edefb3b9af0ab147bc29

configure

 #! /bin/sh
-# From configure.ac Revision.
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.69 for asterisk trunk.
 #
@@ -3706,7 +3705,7 @@ case $host_os in *\ *) host_os=`echo "$host_os" | sed 's/ /-/g'`;; esac
 ac_aux_dir=
-for ac_dir in `pwd` "$srcdir"/`pwd`; do
+for ac_dir in "$srcdir"/; do
   if test -f "$ac_dir/install-sh"; then
     ac_aux_dir=$ac_dir
     ac_install_sh="$ac_aux_dir/install-sh -c"
@@ -3722,7 +3721,7 @@ for ac_dir in `pwd` "$srcdir"/`pwd`; do
   fi
 done
 if test -z "$ac_aux_dir"; then
-  as_fn_error $? "cannot find install-sh, install.sh, or shtool in \`pwd\` \"$srcdir\"/\`pwd\`" "$LINENO" 5
+  as_fn_error $? "cannot find install-sh, install.sh, or shtool in \"$srcdir\"/" "$LINENO" 5
 fi
 # These three variables are undocumented and unsupported,
@@ -3737,7 +3736,6 @@ ac_configure="$SHELL $ac_aux_dir/configure"  # Please don't use this var.
-
 # preserve any CFLAGS or LDFLAGS that may be set
 # NOTE: This must be done before calling any macros that end up
 # calling AC_PROG_CC or the like, since they will set a default

configure.ac

@@ -17,10 +17,9 @@ AC_CANONICAL_HOST
 # check existence of the package
 AC_CONFIG_SRCDIR([main/asterisk.c])
 
-AC_CONFIG_AUX_DIR(`pwd`)
+AC_CONFIG_AUX_DIR()
 
 AC_COPYRIGHT("Asterisk")
-AC_REVISION($Revision$)
 
 # preserve any CFLAGS or LDFLAGS that may be set
 # NOTE: This must be done before calling any macros that end up