Generate proguard rules for code gen on demand (#1067)

* Extract target constructor signature into TargetConstructor.kt

We'll need this to know what the runtime types are for proguard rules

* Add ProguardConfig

* Wire in proguard config

* Write proguard configs out with adapters

* Add full tests

* Now remove the rules!

* Ignore on inline classes for now

* Pass adapter constructor params correctly

kotlin/codegen/pom.xml

@@ -47,6 +47,11 @@
       <artifactId>kotlinpoet-classinspector-elements</artifactId>
       <version>${kotlinpoet.version}</version>
     </dependency>
+    <dependency>
+      <groupId>org.ow2.asm</groupId>
+      <artifactId>asm</artifactId>
+      <version>${asm.version}</version>
+    </dependency>
     <dependency>
       <groupId>net.ltgt.gradle.incap</groupId>
       <artifactId>incap</artifactId>