Change method of checking main symbol

Change method of checking main symbol

Some binary may need to launch daemons for loading them.
In special case such as mic build, deamons are not launched.
As a result, the parser should not use dlopen().

Change-Id: I102eb220d4ecab2657668a335af95257de981e79
Signed-off-by: Changgyu Choi <changyu.choi@samsung.com>