usb: Add utility for D-Bus

Putting all D-Bus related operation to the utils file.

Tested: Call the set/getProperty functions locally and successfully
set/get the corresponding attribute value.

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I0e0c33fd6ec5db3a47babaf417b0c708709e580b
diff --git a/usb/meson.build b/usb/meson.build
index 0de8e33..9ac5876 100644
--- a/usb/meson.build
+++ b/usb/meson.build
@@ -10,6 +10,7 @@
 source = [
     'usb_manager_main.cpp',
     'usb_manager.cpp',
+    '../utils.cpp',
     ]
 
 phosphor_logging_dep = dependency(
@@ -24,6 +25,7 @@
     dependencies: [
         CLI11_dep,
         phosphor_logging_dep,
+        sdbusplus_dep,
     ],
     install: true,
     install_dir: get_option('bindir')