Example CacheLib with Proxygen

Summary:
For some benchmarking we like to have the network stack included - here is a simple example of adding CacheLib on top of proxygen for receiving data via HTTP request.

## Quick Setup (assumes dependencies live at CacheLib/opt)

### Build and run
```
getdeps.py install-system-deps cachelib
getdeps.py build --allow-system-packages cachelib
getdeps.py build --allow-system-packages proxygen

./build.sh
./build/proxygen_cache
```

### PUT a value
`curl -X PUT --data-binary 'hello world' http://localhost:8111/cache/greeting -i`
### GET it back
`curl http://localhost:8111/cache/greeting -i`
### DELETE it
`curl -X DELETE http://localhost:8111/cache/greeting -i`

X-link: facebook/CacheLib#416

Reviewed By: SamirFarhat17

Differential Revision: D84167914

Pulled By: juwinviray

fbshipit-source-id: 068a7d0d1d3dcb1ca7446a736c79f59a5c0e7fa0

Author: byrnedj

build/fbcode_builder/manifests/libiberty

@@ -5,9 +5,12 @@ name = libiberty
 binutils-devel
 binutils
 
-[debs]
+[debs.not(all(distro=ubuntu,distro_vers="24.04"))]
 binutils-dev
 
+[debs.all(distro=ubuntu,distro_vers="24.04")]
+binutils-x86-64-linux-gnu
+
 [download]
 url = https://ftp.gnu.org/gnu/binutils/binutils-2.43.tar.xz
 sha256 = b53606f443ac8f01d1d5fc9c39497f2af322d99e14cea5c0b4b124d630379365