Optimize getFqName calls in KotlinBuiltIns

Check the simple name first, and only then construct the full FqName, in all
'is*' methods

idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/stubBuilder/ClassClsStubBuilder.kt

@@ -61,7 +61,7 @@ private class ClassClsStubBuilder(
     private val supertypeIds = run {
         val supertypeIds = classProto.supertypes(c.typeTable).map { c.nameResolver.getClassId(it.className) }
         //empty supertype list if single supertype is Any
-        if (supertypeIds.singleOrNull()?.let { KotlinBuiltIns.isAny(it.asSingleFqName().toUnsafe()) } ?: false) {
+        if (supertypeIds.singleOrNull()?.let { KotlinBuiltIns.FQ_NAMES.any == it.asSingleFqName().toUnsafe() } ?: false) {
             listOf()
         }
         else {

idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/stubBuilder/TypeClsStubBuilder.kt

@@ -253,7 +253,7 @@ class TypeClsStubBuilder(private val c: ClsStubBuilderContext) {
 
     private fun Type.isDefaultUpperBound(): Boolean {
         return this.hasClassName() &&
-               c.nameResolver.getClassId(className).let { KotlinBuiltIns.isAny(it.asSingleFqName().toUnsafe()) } &&
+               c.nameResolver.getClassId(className).let { KotlinBuiltIns.FQ_NAMES.any == it.asSingleFqName().toUnsafe() } &&
                this.nullable
     }
 }