tools: revert to installing in /usr

26470:acaf29203cf9 missed a bunch of hardcoded paths, e.g. in the
initscripts. I think at this juncture it is appropriate to revert
this change and try again after some more testing.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>

docs/configure

@@ -557,6 +557,7 @@ PACKAGE_BUGREPORT='xen-devel@lists.xen.org'
 PACKAGE_URL='http://www.xen.org/'
 
 ac_unique_file="misc/xen-command-line.markdown"
+ac_default_prefix=/usr
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 MARKDOWN
@@ -1663,6 +1664,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 ac_config_files="$ac_config_files ../config/Docs.mk"
 
+
 ac_aux_dir=
 for ac_dir in ../ "$srcdir"/../; do
   if test -f "$ac_dir/install-sh"; then