usb: Initialize USB Code Update

Compile the USB Code Update function after enabling `usb-code-update`,
and expect to pass in the name of the USB mount folder when calling
the process.

Also, the dependency of CLI11 has been added.

Tested: enabled `usb-code-update` and built `phosphor-bmc-code-mgmt`
successfully and check that there is a `phosphor-usb-code-update`
process in image-bmc.

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: Iedfb63c3866cc8542afef9b54bfeaaf5f7b40c6b
diff --git a/usb/meson.build b/usb/meson.build
new file mode 100644
index 0000000..f0ac2d0
--- /dev/null
+++ b/usb/meson.build
@@ -0,0 +1,22 @@
+if cpp.has_header('CLI/CLI.hpp')
+    CLI11_dep = declare_dependency()
+else
+    CLI11_dep = dependency(
+        'CLI11',
+        fallback: [ 'CLI11', 'CLI11_dep' ],
+    )
+endif
+
+source = [
+    'usb_manager_main.cpp',
+    ]
+
+executable(
+    'phosphor-usb-code-update',
+    source,
+    dependencies: [
+        CLI11_dep,
+    ],
+    install: true,
+    install_dir: get_option('bindir')
+)