RSE: Conditionally link shared symbols in bl1 test

When TEST_BL1_1 or TEST_BL1_2 are disabled, don't try to link their
respective shared symbol files into the test executable

Change-Id: I8f0bb3676d119463c61d6064a6a024299986347f
Signed-off-by: Raef Coles <raef.coles@arm.com>
1 file changed