automatically adjust path to installer in the configuration file

git-svn-id: svn+ssh://svn.psi-im.org/home/psi/svn/win-installer/trunk@40 2d3a5ac0-73f9-4639-b284-2310bd1da355

Makefile

@@ -2,7 +2,11 @@
 
 .PHONY: all languages files build clean
 
-all: languages files build
+all: path_config languages files build
+
+path_config:
+	sed -i.orig 's|!define INSTALLER_HOME.*|!define INSTALLER_HOME "$(CURDIR)"|g' config.nsh
+	rm config.nsh.orig
 
 languages:
 	@cd tools; ./preplang ../app/psi_lang