scram-project-build: relocate binaries for ELF

Patch test/$SCRAM_ARCH ELF binaries with a custom build of dynamic
loader.

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>
Merge pull request #863 from davidlt/relocate-tests

scram-project-build: relocate binaries for ELF