fix if build file name has ../ or ./

PR:  26765
Reported by: Ian E. Gorman


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@276213 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/helper/ProjectHelper2.java

@@ -154,7 +154,7 @@ public class ProjectHelper2 extends ProjectHelper {
 
         if (source instanceof File) {
             buildFile = (File) source;
-            buildFile = new File(buildFile.getAbsolutePath());
+            buildFile = fu.normalize(buildFile.getAbsolutePath());
             context.setBuildFile(buildFile);
             buildFileName = buildFile.toString();
 //         } else if (source instanceof InputStream ) {