hw: enable and maintain outer l2 cache

Fix #1170
hw & cortex_a9: do lazy FPU-context switch

ref #1126
base: test for the pseudo-parallel use of an FPU

fix #1126
lxip: dissolve receiver in socket handler

Fixes #1179.
test-input: use key name from input/keycode.h
fixup "vbox: add test for shared folders"
netperf: wait for output of all spawned processes