Use the legacy linker namespace configs when target is sanitized

The new linker namespace config causes problem when the target is
sanitized: vendor libs which are loaded in the sphal namespace can't
link against to libclang_rt* libs which are in /system/lib directory
because the directory is not allowed for sphal namsapce.

Long-term solution would be installing libclang_rt* to both /system/lib
and /vendor/lib so that vendor libs can link against to the one in
/vendor/lib.

Until the work is done, let's just disable the new linker namespace
config when the target is to be sanitized.

Bug: 63535130
Test: make SANITIZE_TARGET=integer_overflow
SANITIZE_TARGET_DIAG=integer_overflow builds and boots to the UI

Merged-In: I6afb69885aaa3d25e554b9ca699a572248bfc50a
Change-Id: I6afb69885aaa3d25e554b9ca699a572248bfc50a
(cherry picked from commit fff6f75f)