Add missing import

Author: 0marperez

aws-runtime/aws-endpoint/common/src/aws/sdk/kotlin/runtime/endpoint/functions/Functions.kt

@@ -9,6 +9,7 @@ import aws.sdk.kotlin.runtime.InternalSdkApi
 import aws.smithy.kotlin.runtime.client.endpoints.functions.isValidHostLabel
 import aws.smithy.kotlin.runtime.net.isIpv4
 import aws.smithy.kotlin.runtime.net.isIpv6
+import kotlin.jvm.JvmOverloads
 
 // the number of top-level components an arn contains (separated by colons)
 private const val ARN_COMPONENT_COUNT = 6