Disallow break or continue across a function boundary

Code containing breaks or continues that attempt to jump across a
function boundary weren't detected during analysis but would crash
the compiler during code generation. Add diagnostics for these kinds
of errors.

Example:

fun f() {
    while (true) {
        fun inner() {
            continue
        }
    }
}

 #KT-4334 Fixed

compiler/tests/org/jetbrains/jet/checkers/JetDiagnosticsTestGenerated.java

@@ -1745,6 +1745,11 @@ public class JetDiagnosticsTestGenerated extends AbstractJetDiagnosticsTest {
                 doTest("compiler/testData/diagnostics/tests/controlStructures/ForbidStatementAsDirectFunctionBody.kt");
             }
             
+            @TestMetadata("jumpAcrossFunctionBoundary.kt")
+            public void testJumpAcrossFunctionBoundary() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/controlStructures/jumpAcrossFunctionBoundary.kt");
+            }
+            
             @TestMetadata("kt1075.kt")
             public void testKt1075() throws Exception {
                 doTest("compiler/testData/diagnostics/tests/controlStructures/kt1075.kt");