From: Helmut Grohne <helmut@subdivi.de>
Subject: consider ac_tool_prefix when searching for pkg-config

PKG_CHECK_MODULES will require PKG_PROG_PKG_CONFIG which sets PKG_CONFIG
correctly.

Index: wv-1.2.9/configure.ac
===================================================================
--- wv-1.2.9.orig/configure.ac
+++ wv-1.2.9/configure.ac
@@ -74,8 +74,6 @@
 
 AC_PROG_LIBTOOL
 
-AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
-
 # libgsf depends on glib and libxml2, so we should be fine
 libgsf_req='libgsf-1 >= 1.13.0'
 DEPS_PKGS="$libgsf_req"