Fix relative path in build-script

The build-script  assumed that it was nested  two levels deep from the
project's root  directory, even if  it is only nested  one level deep;
that bug is now fixed.

scripts/build.bash

@@ -1,7 +1,7 @@
 
 cd $(dirname $0)
 SCRIPT_PATH=$(pwd)
-cd ../..
+cd ..
 PROJECT_PATH=$(pwd)
 
 function list_modules() {
@@ -77,7 +77,7 @@ rm -f .build/archives/*.a
 MODULE_LIST=$(list_modules "modules")
 for MODULE in $MODULE_LIST
 do
-    build_single_module $MODULE
+    build_single_module $MODULE 
 done
 
 gcc -g3 -o voxula .build/archives/*.a