common: move asyncSystem() to common

asyncSystem() is shared across updaters, so moved to common.

Change-Id: I3545d34ecc1f1bf8a226d020267ae00bcf42c5f9
Signed-off-by: Kevin Tung <Kevin.Tung@quantatw.com>
diff --git a/common/meson.build b/common/meson.build
index 1e29ae8..8f515e1 100644
--- a/common/meson.build
+++ b/common/meson.build
@@ -9,6 +9,7 @@
     'src/software.cpp',
     'src/software_update.cpp',
     'src/host_power.cpp',
+    'src/utils.cpp',
     include_directories: ['.', 'include/', common_include],
     dependencies: [pdi_dep, phosphor_logging_dep, sdbusplus_dep, libpldm_dep],
 )