Fix the asm jar version required by javac2 in ant build

When one asks IJ to create an Ant build for the project, and "Enable UI forms compilation" is checked on the dialog, the output build file incorrectly references ``asm4-all.jar`` which causes the exception below, whereas ``asm-all.jar`` builds the project correctly.

    Caused by: java.lang.ClassNotFoundException: org.jetbrains.org.objectweb.asm.ClassVisitor
      at org.apache.tools.ant.AntClassLoader.findClassInComponents(AntClassLoader.java:1374)
      at org.apache.tools.ant.AntClassLoader.findClass(AntClassLoader.java:1323)
      at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:1076)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
      ... 20 more

This behavior is present in 2c694642 and in the latest 14 EAP (139.1.20).