Remove unnecessary usages of JetFile#getPackageDirective where only FqName is needed
Make JetFile#getPackageFqName not nullable to avoid confusion on call sites
Remove getPackageName usages
Move getFqName(JetNamedDeclaration) to a separate util class
This is needed because our built-ins can be loaded with two different
mechanisms (deserialization and lazy resolve) and, when that happens,
corresponding descriptors aren't equal to each other, so one of two resolved
descriptors for Any (or the same with Nothing) was never considered to be a
"special class" with no supertypes
Make it serialize data for all packages found in sources and not only
KotlinBuiltIns.FQ_NAME, i.e. "jet". This is required to migrate built-ins from
package "jet" to "kotlin"
Don't store binary data in the repository anymore. From now on any test on the
compiler requires that 'ant dist' was executed at least once since the last
update of the built-ins
BuiltInsSerializer will be distributed with Kotlin compiler from now on. This
will allow to serialize binary data of built-ins on 'ant dist', as opposed to
storing all *.kotlin_class files in the repository: ant dist will just invoke
this serializer from bootstrap-compiler.jar
Alexander Udalov