Revert "elf: Refuse to dlopen PIE objects [BZ #24323]"

Revert "elf: Refuse to dlopen PIE objects [BZ #24323]"

This reverts commit 2c75b545de6fe3c44138799c68217a94bc669a88.

Tizen C/C++ application uses launchpad-loader to improve application execution
speed. When the application execution request is received, the launchpad-loader
opens the executables of the application built with -fPIE via dlopen() to call
the main() function. With this patch, the launchpad-loader cannot open the
executables via dlopen().

Change-Id: I9c994a27890c8954e64d9bea566a63f03682a570