tests: trac#240: Amend the fashion we test hidden symbols.
tests: trac#240: Amend the fashion we test hidden symbols.

This shall be interim `solution' until trac#188 is resolved.

Addressing:
test_oscap_common.o: In function `oscap_alloc':
/root/openscap/openscap-0.9.1/_build/tests/API/XCCDF/unittests/../../../../../src/common/alloc.h:105: undefined reference to `__oscap_alloc_dbg'
test_oscap_common.o: In function `oscap_calloc':
/root/openscap/openscap-0.9.1/_build/tests/API/XCCDF/unittests/../../../../../src/common/alloc.h:111: undefined reference to `__oscap_calloc_dbg'
test_oscap_common.o: In function `oscap_realloc':
/root/openscap/openscap-0.9.1/_build/tests/API/XCCDF/unittests/../../../../../src/common/alloc.h:117: undefined reference to `__oscap_realloc_dbg'
test_oscap_common.o: In function `oscap_reallocf':
/root/openscap/openscap-0.9.1/_build/tests/API/XCCDF/unittests/../../../../../src/common/alloc.h:123: undefined reference to `__oscap_reallocf_dbg'
test_oscap_common.o: In function `oscap_free':
/root/openscap/openscap-0.9.1/_build/tests/API/XCCDF/unittests/../../../../../src/common/alloc.h:129: undefined reference to `__oscap_free_dbg'
collect2: ld returned 1 exit status

openprivacy/openscap,ybznek/openscap,openprivacy/openscap,redhatrises/openscap,isimluk/openscap,postfix/openscap,openprivacy/openscap,postfix/openscap,isimluk/openscap,mpreisler/openscap,OpenSCAP/openscap,ybznek/openscap,isimluk/openscap,Hexadorsimal/openscap,postfix/openscap,redhatrises/openscap,jan-cerny/openscap,redhatrises/openscap,mpreisler/openscap,mpreisler/openscap,jan-cerny/openscap,mpreisler/openscap,redhatrises/openscap,mpreisler/openscap,redhatrises/openscap,ybznek/openscap,redhatrises/openscap,jan-cerny/openscap,openprivacy/openscap,isimluk/openscap,OpenSCAP/openscap,jan-cerny/openscap,OpenSCAP/openscap,postfix/openscap,ybznek/openscap,ybznek/openscap,Hexadorsimal/openscap,Hexadorsimal/openscap,openprivacy/openscap,postfix/openscap,Hexadorsimal/openscap,Hexadorsimal/openscap,ybznek/openscap,postfix/openscap,mpreisler/openscap,Hexadorsimal/openscap,isimluk/openscap,openprivacy/openscap,OpenSCAP/openscap,jan-cerny/openscap,jan-cerny/openscap,OpenSCAP/openscap,isimluk/openscap,OpenSCAP/openscap