8013914: Removed explicit LineNumberNodes that were too brittle when code moves around, and also introduced unnecessary footprint. Introduced the Statement node and fixed dead code elimination issues that were discovered by the absense of labels for LineNumberNodes.
Reviewed-by: jlaskey, attila
# We would like to avoid references from anywhere outside nashorn
# to codegen, IR and parser packages, in particular script generated classes.
# We ensure that by overriding "package.access" security property.
# The following "package.access" value was copied from default java.security
# of jre/lib/security and appended with nashorn sensitive packages.
#
# List of comma-separated packages that start with or equal this string
# will cause a security exception to be thrown when
# passed to checkPackageAccess unless the
# corresponding RuntimePermission ("accessClassInPackage."+package) has
# been granted.
package.access=sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.org.glassfish.external.,com.sun.org.glassfish.gmbal.,jdk.internal.,jdk.nashorn.internal.,jdk.nashorn.tools.