emul_state: cleaned-up bin path and log path

emul_state: cleaned-up bin path and log path

"bin_path" is stored in global variale.
"get_log_redirection_path()" provide *real* redirection path
that is aquired by system runtime information.
(In Windows, it works on WINVER > 0x600 - vista or newer - only.
Otherwise, it still provide assembled log path using legacy method.)

Change-Id: I24e04d3238a6a6727b025f51250d8646674b9662
Signed-off-by: SeokYeon Hwang <syeon.hwang@samsung.com>