Update LLVM toolchain to r383902b.

Bug: http://b/149417653
Test: m
Change-Id: I0e191b463852da8b5eb5a4e092ef9b5da255df3d
diff --git a/cc/config/global.go b/cc/config/global.go
index 1dd8a2d..7b651bc 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -128,8 +128,8 @@
 
 	// prebuilts/clang default settings.
 	ClangDefaultBase         = "prebuilts/clang/host"
-	ClangDefaultVersion      = "clang-r383902"
-	ClangDefaultShortVersion = "11.0.1"
+	ClangDefaultVersion      = "clang-r383902b"
+	ClangDefaultShortVersion = "11.0.2"
 
 	// Directories with warnings from Android.bp files.
 	WarningAllowedProjects = []string{