KT-5214 Annotation to provide platform name to avoid signature conflict

#KT-5214 Fixed

compiler/testData/compileJavaAgainstKotlin/method/platformName/PlatformName.java

@@ -0,0 +1,7 @@
+package test;
+
+public class PlatformName {
+    public static void main(String[] args) {
+        TestPackage.bar();
+    }
+}

compiler/testData/compileJavaAgainstKotlin/method/platformName/PlatformName.kt

@@ -0,0 +1,6 @@
+package test
+
+import kotlin.platform.*
+
+[platformName("bar")]
+fun foo() {}

compiler/testData/compileJavaAgainstKotlin/property/platformName/PlatformName.java

@@ -0,0 +1,8 @@
+package test;
+
+public class PlatformName {
+    public static void main(String[] args) {
+        int x = TestPackage.vget();
+        TestPackage.vset(0);
+    }
+}

compiler/testData/compileJavaAgainstKotlin/property/platformName/PlatformName.kt

@@ -0,0 +1,9 @@
+package test
+
+import kotlin.platform.*
+
+var v: Int = 1
+    [platformName("vget")]
+    get
+    [platformName("vset")]
+    set