[onert] Use dlmopen for codegen lib

[hseok-oh]

This commit changes dlopen() to dlmopen() for codegen library.
It's hard to control dependent library version with runtime's core.
It can help to find internally linked static library version first in dynamic library.
This feature is not supported on android.

ONE-DCO-1.0-Signed-off-by: Hyeongseok Oh [email protected]

[hseok-oh]

https://manpages.debian.org/testing/manpages-dev/dlmopen.3.en.html#dlmopen()

The dlmopen() function differs from dlopen() primarily in that it accepts an additional argument, lmid, that specifies the link-map list (also referred to as a namespace) in which the shared object should be loaded. (By comparison, dlopen() adds the dynamically loaded shared object to the same namespace as the shared object from which the dlopen() call is made.) The Lmid_t type is an opaque handle that refers to a namespace.

LM_ID_NEWLM
Create a new namespace and load the shared object in that namespace. The object must have been correctly linked to reference all of the other shared objects that it requires, since the new namespace is initially empty.

[ragmani]

LGTM

[jyoungyun]

LGTM