[AIX][driver] Include crti[_64].o and -bcdtors also for C language link invocations by default

In order to support attribute((constructor)) and attribute((destructor)),
which is used by various LLVM non-C++ runtime components, AIX will include
crti[_64].o and -bcdtors for C language link invocations by default.

Differential Revision: https://reviews.llvm.org/D91361