fixup "base: Genode's dynamic linker"

os: Remove left over linker make files

Issue #1280
init: clamp priority values to valid range

This patch ensures that priority values passed as session arguments
are within the valid range of priorities. Without the clamping, a child
could specify a priority of a lower priority band than the one assigned
to the subsystem. Thanks to Johannes Schlatow for reporting this issue.

Fixes #1279
okl4: fix success condition in priority test
fixup: "base: Genode's dynamic linker"

Add copy relocations to all platforms, also fix "REL_386_32" by actually adding
the addend.