ld/testsuite: exclude relocs from section contributions PDB test

A bug in ld meant that we were erroneously generating image relocations
for .secrel32 ops, which we then reflected in our PDB section
contributions because the linker was adding a .reloc section.

This was incidental to what we were testing for, so pass
--disable-reloc-section to ld in order to ensure a consistent output.
2 files changed