Correct synthetic extensions for methods like "getURL"

compiler/testData/diagnostics/tests/syntheticExtensions/AbbreviationName.kt

@@ -0,0 +1,13 @@
+// FILE: KotlinFile.kt
+fun foo(javaClass: JavaClass) {
+    javaClass.URL = javaClass.URL + "/"
+
+    javaClass.<!UNRESOLVED_REFERENCE!>url<!>
+    javaClass.<!UNRESOLVED_REFERENCE!>uRL<!>
+}
+
+// FILE: JavaClass.java
+public class JavaClass {
+    public String getURL() { return true; }
+    public void setURL(String value) { }
+}

compiler/testData/diagnostics/tests/syntheticExtensions/AbbreviationName.txt

@@ -0,0 +1,12 @@
+package
+
+internal fun foo(/*0*/ javaClass: JavaClass): kotlin.Unit
+
+public open class JavaClass {
+    public constructor JavaClass()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open fun getURL(): kotlin.String!
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open fun setURL(/*0*/ value: kotlin.String!): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}