This local hack was pushed by mistake

...as part of 5ab1098d5fbc1ba092da73af2b92e5bcdd7a3f8d "Generalize
-fsanitize=address checks."

Change-Id: I6141746b2d8059bd6bbcc466a86dd3da3c55f592
Also on Linux do not export symbols from static orcus libraries

...otherwise e.g. running CppunitTest_sc_filters_test under -fsanitize=address
complains about ODR violation of 'vtable for orcus::csv::parse_error' exported
from both libsclo.so and libscqahelper.so.

A problem could potentially arise with exceptions thrown from static orcus code
linked into library and intended to be caught in another, but hopefully all such
exceptions are intended to be caught already locally anyway.

Change-Id: Iff5c73d7a2324b457c2e86656c11b18f7ba210f6