The previous commit added gson to `incremental-compilation-impl` module.
However, gson is currently not added to -libraryjars for Proguard, so
running with -Pteamcity=true would fail with
```
> Task :kotlin-compiler:proguard
Warning: ... can't find referenced class com.google.gson.Gson
Warning: ... can't find referenced class com.google.gson.GsonBuilder
You may need to add missing library jars or update their versions.
If your code works fine without the missing classes, you can suppress
the warnings with '-dontwarn' options.
(http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedclass)
```
This commits adds -dontwarn com.google.gson.** to work around this
error. The proper fix is probably to add gson (and many other libraries)
to Proguard's -libraryjars.
This method is used by serialization plugin to read runtime JAR
manifest.
Maven serialization plugin seems to use proguarded compiler
distribution,
so to use this method, it should be kept.
Size increased for about 2kb.
Exclude jdk files form libraries input. Instead add jdk major version
to inputs. JavaCompile task acts same to ignore fluctuations in JDK
implementations since api should remain same
Hung Nguyen