[roll] Roll fuchsia [clang] Add missing headers after libc++ update

 In llvm/llvm-project#99738 libc++ removed cmath
 from one of its header files, and several places in Fuchsia are no
 longer including the required header for rounding functions.
 Additionally, it seems some code is no longer picking up chrono.

Original-Fixed: 359865937
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1100755
Owners-Override: James Robinson <[email protected]>
Original-Revision: 48579ca230b544ff7fc888910208cc455ff24b7b
GitOrigin-RevId: 98f3c6f8b3708bac4a1a55b4320c65e6aa6bbb59
Change-Id: Id61e92d586532ab750e91df21de13efa9f4024d2

Author: Paul Kirth

stem

@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="34efde8e4a778520b5d7cee49e2952fffd22e2af"/>
+             revision="48579ca230b544ff7fc888910208cc455ff24b7b"/>
   </projects>
   <hooks>
     <hook name="install-environment"