rump: Use fixed commit for NetBSD sources

Issue #1048
test: be more strict for affinity.run

Check that in every round really all threads are alive on all CPUs. It
happened that only the first round was ok (all alive) and in the next rounds
some were dead. Unfortunately the test claimed to be successful.
nitpicker: Parent-child relation between views

Fixes #1020
nitpicker: Respond to session-local focus change

This patch improves the focus handling by updating the menubar each time
the user clicks on a different view, even the old and new view belong
to the same session.
os/reporter.h: Don't enable if connection fails

If opening a report session fails (for example because of invalid
session arguments) and an exception is thrown during the session
construction, the report would wrongly keep the enabled state.
By moving the assignment of the state after the construction,
the report stays disabled as it should be.
Qt5: use Nitpicker instead of liquid_fb

Fixes #1072.
Arora: increase RAM quota for 'testnit'

This patch increases the RAM quota for 'testnit' in the Arora nitpicker
plugin demo.

Fixes #1074.
Qt5: add the QPluginWidget test

Fixes #1073.
dynamic_rom: Don't mention decorator

Omit the decorator.run script from the README file because it is not
integrated in mainline yet.
dynamic_rom: Additional documentation
fixup "rump: Port of the rump kernels to Genode"
rump: Remove deprecated ARM instruction

Substitute 'swpb' (swap byte) instruction with 'ldrexb/strexb', because 'swpb'
needs to be enabled explicitly by the kernel, which is done by neither HW or FOC.
When disabled, 'swpb' will cause an undefined instruction exception.

Issue #1048