Move to Kotlin friendly supportLibrary extension calling.

Test: None
Change-Id: I317174fb90b440ce036230d604d81343f32c4cfb
diff --git a/v13/build.gradle b/v13/build.gradle
index cf2b100..885ca09 100644
--- a/v13/build.gradle
+++ b/v13/build.gradle
@@ -25,9 +25,9 @@
 }
 
 supportLibrary {
-    name 'Android Support Library v13'
-    publish true
-    inceptionYear '2011'
-    description "The Support Library is a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs. Compatible on devices running API 14 or later."
-    legacySourceLocation true
+    name = "Android Support Library v13"
+    publish = true
+    inceptionYear = "2011"
+    description = "The Support Library is a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs. Compatible on devices running API 14 or later."
+    legacySourceLocation = true
 }