Remove dependency to capi-system-info

Remove dependency to capi-system-info

Due to the introduction of subsession feature on buxton2, new dependency
"buxton2->sessiond" was added, and it made the cycle dependency below.
 • buxton2 -> sessiond -> libsyscommon -> capi-system-info
   --(VD only)-> factory-api --(VD only)-> buxton2

To break the cycle dependency, removed libsyscommon->capi-system-info
dependency. The capi-system-info had been only used to figure out
whether the target is emulator or not, so changed it by exploiting
predefined macro from project_config, %{_with_emulator}.

Change-Id: I7b0f64ca99d9da5bce104322eb2293bb721f9ef8
Signed-off-by: Youngjae Cho <y0.cho@samsung.com>