Update NdkMaxPrebuiltVersionInt.

We have newer NDK prebuilts now.

Test: make checkbuild
Bug: None
Change-Id: I00ba5d1638832bc0feff46599afbaa201294fdad
diff --git a/cc/config/global.go b/cc/config/global.go
index ef710c8..5e99cde 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -112,7 +112,7 @@
 	ExperimentalCStdVersion   = "gnu11"
 	ExperimentalCppStdVersion = "gnu++1z"
 
-	NdkMaxPrebuiltVersionInt = 24
+	NdkMaxPrebuiltVersionInt = 27
 
 	// prebuilts/clang default settings.
 	ClangDefaultBase         = "prebuilts/clang/host"