Generate optimized hashCode for primitive type with jvmTarget 1.8+

#KT-7571 Fixed

compiler/testData/codegen/java8/bytecodeText/hashCode/hashCode.kt

@@ -0,0 +1,26 @@
+// JVM_TARGET: 1.8
+
+fun box(): String {
+    true.hashCode()
+    1.toByte().hashCode()
+    1.toChar().hashCode()
+    1.toShort().hashCode()
+    1.hashCode()
+    1L.hashCode()
+    1.0F.hashCode()
+    1.0.hashCode()
+    "".hashCode()
+
+    return "OK"
+}
+
+// 9 \.hashCode
+// 1 INVOKESTATIC java/lang/Boolean\.hashCode \(Z\)I
+// 1 INVOKESTATIC java/lang/Byte\.hashCode \(B\)I
+// 1 INVOKESTATIC java/lang/Character\.hashCode \(C\)I
+// 1 INVOKESTATIC java/lang/Short\.hashCode \(S\)I
+// 1 INVOKESTATIC java/lang/Integer\.hashCode \(I\)I
+// 1 INVOKESTATIC java/lang/Long\.hashCode \(J\)I
+// 1 INVOKESTATIC java/lang/Float\.hashCode \(F\)I
+// 1 INVOKESTATIC java/lang/Double\.hashCode \(D\)I
+// 1 INVOKEVIRTUAL java/lang/String\.hashCode \(\)I