Add CLI11 manifest

Summary: Adding a oss manifest for CLI11 to fetch from github

Reviewed By: shri-khare

Differential Revision: D29833128

fbshipit-source-id: 39cae08f9a15b87da0fa6e26c7b9e0387a7cec50

build/fbcode_builder/manifests/CLI11

+[manifest]
+name = CLI11
+
+[download]
+url = https://github.com/CLIUtils/CLI11/archive/v1.9.0.tar.gz
+sha256 = 67640f37ec3be9289039930c987a492badc600645b65057023679f7bb99734e4
+
+[build]
+builder = cmake
+subdir = CLI11-1.9.0
+
+[cmake.defines]
+CLI11_BUILD_TESTS = OFF
+CLI11_BUILD_EXAMPLES = OFF