Retain relevant comments from system/core/rootdir/etc/ld.config.txt.

This CL carries over the comments from the old text config that was deleted
in https://r.android.com/1128832.

Test: N/A - comment changes only
Bug: 138920271
Change-Id: I4309599228cace3d19bba7bc992e80fe2eb66c69
18 files changed