[PS4][clang] Fix the format of the LTO debug options passed to orbis-ld

Currently, we pass multiple LTO debug options to orbis-ld like this:

orbis-ld --lto=thin --lto-thin-debug-options=<arg1> --lto-thin-debug-options=<arg2> ...

When it should be like this:

orbis-ld --lto=thin "--lto-thin-debug-options= <arg1> <arg2>" ...

Differential Revision: https://reviews.llvm.org/D147546