[LLVM] Update cmake and library layering maintainers (#120542)

Currently @chandlerc is listed as the maintainer for "CMake and library
layering", but he has not been active in that area in while.
Consequently, this patch updates the maintainers for CMake and
library layering to folks who are working more actively in these
areas.

See https://llvm.org/docs/DeveloperPolicy.html#maintainers for
context on the maintainers terminology.

Author: nikic

llvm/Maintainers.md

@@ -333,10 +333,10 @@ jakub@nod-labs.com (email), [kuhar](https://github.com/kuhar) (GitHub)
 Peter Collingbourne \
 peter@pcc.me.uk (email), [pcc](https://github.com/pcc) (GitHub)
 
-#### CMake and library layering
+#### CMake
 
-Chandler Carruth \
-chandlerc@gmail.com, chandlerc@google.com (email), [chandlerc](https://github.com/chandlerc) (GitHub)
+Petr Hosek \
+phosek@google.com (email), [petrhosek](https://github.com/petrhosek) (GitHub)
 
 #### Debug info and DWARF
 
@@ -356,6 +356,11 @@ echristo@gmail.com (email), [echristo](https://github.com/echristo) (GitHub)
 Teresa Johnson \
 tejohnson@google.com (email), [teresajohnson](https://github.com/teresajohnson) (GitHub)
 
+#### Library layering
+
+Takumi Nakamura \
+geek4civic@gmail.com (email), [chapuni](https://github.com/chapuni) (GitHub)
+
 #### MCJIT, Orc, RuntimeDyld, PerfJITEvents
 
 Lang Hames \
@@ -477,7 +482,7 @@ sabre@nondot.org (email), [lattner](https://github.com/lattner) (GitHub), clattn
 
 Paul C. Anagnostopoulos (paul@windfall.com, [Paul-C-Anagnostopoulos](https://github.com/Paul-C-Anagnostopoulos)) -- TableGen \
 Justin Bogner (mail@justinbogner.com, [bogner](https://github.com/bogner)) -- SelectionDAG \
-Chandler Carruth (chandlerc@gmail.com, chandlerc@google.com, [chandlerc](https://github.com/chandlerc)) -- ADT, Support, Inlining \
+Chandler Carruth (chandlerc@gmail.com, chandlerc@google.com, [chandlerc](https://github.com/chandlerc)) -- ADT, Support, Inlining, CMake and library layering \
 Peter Collingbourne (peter@pcc.me.uk, [pcc](https://github.com/pcc)) -- LTO \
 Evan Cheng (evan.cheng@apple.com) -- Parts of code generator not covered by someone else \
 Jake Ehrlich (jakehehrlich@google.com, [jakehehrlich](https://github.com/jakehehrlich)) -- llvm-objcopy and ObjCopy library \