[Driver][Android] Removed obsoleted --warn-shared-textrel

--warn-shared-textrel is ignored in ld.lld and obsoleted in GNU ld
(https://sourceware.org/bugzilla/show_bug.cgi?id=22909).

Note: binutils can be configured with --enable-textrel-check=[yes|error]
to make GNU ld error for text relocations by default, like ld.lld.

Reviewed By: srhines

Differential Revision: https://reviews.llvm.org/D118942