[roll] Update Clang toolchain

Test: CQ
Change-Id: I24fcfeea116d10cd5db4820097a800d0ad482294

fuchsia.ensure

diff --git a/fuchsia.ensure b/fuchsia.ensure
index 9ca9cbe..511923b 100644
--- a/fuchsia.ensure
+++ b/fuchsia.ensure
@@ -33,7 +33,7 @@
 
 # Clang
 @Subdir clang
-fuchsia/clang/${platform} git_revision:fdfe4498af7bab15cc7716a6110f60f280bc415b
+fuchsia/clang/${platform} git_revision:f81edba34ddf2e70300baa227b136dcdb8aecb6e
 
 # Go
 @Subdir go

fuchsia.versions

diff --git a/fuchsia.versions b/fuchsia.versions
index a41bb27..a4641b0 100644
--- a/fuchsia.versions
+++ b/fuchsia.versions
@@ -2,12 +2,12 @@
 # Do not modify manually. All changes will be overwritten.
 
 fuchsia/clang/linux-amd64
-	git_revision:fdfe4498af7bab15cc7716a6110f60f280bc415b
-	gxqulZU837Lj_Zc8tC9te-IWOCqAYYzQSVzHLxDfl6oC
+	git_revision:f81edba34ddf2e70300baa227b136dcdb8aecb6e
+	CeRLdLqlWbyBOARjwRLxbKnkFuIbxdZ4NZBzjNJs51kC
 
 fuchsia/clang/mac-amd64
-	git_revision:fdfe4498af7bab15cc7716a6110f60f280bc415b
-	Vz9IRJoiptCDnRddGuvgigCFp4RslfQ7EXzwOPuFSpcC
+	git_revision:f81edba34ddf2e70300baa227b136dcdb8aecb6e
+	mDVqf5WozPsZZAwCJ3DSTRY9XeOF5knxX6VpcHlbQe8C
 
 fuchsia/go/linux-amd64
 	git_revision:b8bd7d94a2ae6c80ab8b6ed5900d3eeba8a777c3