Fix some typos in Soong.

Test: m
Change-Id: I5b332ce12d70f13eca93b23060620c0ea4f46db7
diff --git a/cc/vndk.go b/cc/vndk.go
index f9f3764..2c78047 100644
--- a/cc/vndk.go
+++ b/cc/vndk.go
@@ -31,7 +31,7 @@
 		// declared as a VNDK or VNDK-SP module. The vendor variant
 		// will be installed in /system instead of /vendor partition.
 		//
-		// `vendor_vailable` must be explicitly set to either true or
+		// `vendor_available` must be explicitly set to either true or
 		// false together with `vndk: {enabled: true}`.
 		Enabled *bool