Move apply primitives to their respective hosts

[l4haie]

This PR simply moves the apply primitives from lib/r4rs/control.scm to their respective hosts (i.e. to host/<host>/lib/prim-apply.scm) to remain consistent with other primitives defined using the define-primitive construct (IO primitives, ...).

[leo-ard]

@l4haie You must add one empty file to host/asm/lib/prim-apply.scm to make sure the importation of prim-apply doesn't crash for the asm host. The apply primitive in this case is inside the RVM. See host/asm/lib/prim-io.scm to understand

[l4haie]

@l4haie You must add one empty file to host/asm/lib/prim-apply.scm to make sure the importation of prim-apply doesn't crash for the asm host. The apply primitive in this case is inside the RVM. See host/asm/lib/prim-io.scm to understand

Done.

[leo-ard]

LGTM