Implement source sections compiler plugin

allows to compile only parts of the source files, denoted by top-level
"sections" (function with lambda param calls), but preserving original
file line/column numbers for easier diagnostics. Allow e.g. to compile
gradle "buildscript" section without preprocessing original file in
advance. See tests for examples.

core/util.runtime/src/org/jetbrains/kotlin/utils/addToStdlib.kt

@@ -118,6 +118,14 @@ inline fun <T, R : Any> Iterable<T>.firstNotNullResult(transform: (T) -> R?): R?
     return null
 }
 
+inline fun <T, R : Any> Array<T>.firstNotNullResult(transform: (T) -> R?): R? {
+    for (element in this) {
+        val result = transform(element)
+        if (result != null) return result
+    }
+    return null
+}
+
 inline fun <T> Iterable<T>.sumByLong(selector: (T) -> Long): Long {
     var sum: Long = 0
     for (element in this) {