Switch to clang-r349610

Bug: http://b/122481018

The '-keep' option of llvm-strip has changed to '-keep-section'.  Update
scripts/strip.sh accordingly.

Test: Tested on various targets in AOSP and internal branch.  Googlers
      see http://go/clang-r349610-testing
Change-Id: Ibfc97ecdcdc305c97a4169cead1e1e3cddda9c4c
diff --git a/cc/config/global.go b/cc/config/global.go
index e3d36bd..689b315 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -120,8 +120,8 @@
 
 	// prebuilts/clang default settings.
 	ClangDefaultBase         = "prebuilts/clang/host"
-	ClangDefaultVersion      = "clang-r346389c"
-	ClangDefaultShortVersion = "8.0.7"
+	ClangDefaultVersion      = "clang-r349610"
+	ClangDefaultShortVersion = "8.0.8"
 
 	// Directories with warnings from Android.bp files.
 	WarningAllowedProjects = []string{