autogen.sh: Use autoreconf as recommended in the autoconf manual

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12195 a5019735-40e9-0310-863c-91ae7b9d1cf9

Author: bart

autogen.sh

@@ -1,17 +1,3 @@
 #!/bin/sh
 
-run ()
-{
-    echo "running: $*"
-    eval $*
-
-    if test $? != 0 ; then
-	echo "error: while running '$*'"
-	exit 1
-    fi
-}
-
-run aclocal
-run autoheader
-run automake -a
-run autoconf
+autoreconf -ivf