Do not generate accessor if private function is accessed from

coroutines intrinsic lambda.
The logic is if the lambda is crossinline we need to generate the
accessor. However, suspendCoroutine's and
suspendCoroutineUninterceptedOrReturn's parameter, despite being
crossinline, are effectively inline. Thus, we do not need to generate
the accessor.
 #KT-27503 Fixed

compiler/testData/codegen/bytecodeListing/coroutines/privateAccessor.kt

@@ -0,0 +1,9 @@
+// WITH_RUNTIME
+// COMMON_COROUTINES_TEST
+import COROUTINES_PACKAGE.*
+
+private fun foo() {}
+
+private suspend fun bar() = suspendCoroutine<Unit> {
+    foo()
+}

compiler/testData/codegen/bytecodeListing/coroutines/privateAccessor.txt

@@ -0,0 +1,5 @@
+@kotlin.Metadata
+public final class PrivateAccessorKt {
+    synthetic final static @org.jetbrains.annotations.Nullable method bar(@org.jetbrains.annotations.NotNull p0: kotlin.coroutines.experimental.Continuation): java.lang.Object
+    private final static method foo(): void
+}

compiler/testData/codegen/bytecodeListing/coroutines/privateAccessor_1_3.txt

@@ -0,0 +1,5 @@
+@kotlin.Metadata
+public final class PrivateAccessorKt {
+    synthetic final static @org.jetbrains.annotations.Nullable method bar(@org.jetbrains.annotations.NotNull p0: kotlin.coroutines.Continuation): java.lang.Object
+    private final static method foo(): void
+}