package/pulseview: bump version to 0.3.0

Switch to upstream tarball, remove autoreconf, add hash.

Upstream expects the boost unit tests being activated by default:
http://sigrok.org/gitweb/?p=pulseview.git;a=blobdiff;f=CMakeLists.txt;h=77b0137db22b7b6cab80d8aee7c97fecb8c542bf;hp=a82953cc166141af626ace0e5d2b3a285bf20eea;hb=f513bec599b8d626f914aa804a01325914bdb5e9;hpb=8ada6ef1319fa11fd594a34853967c1f9688913b


Add some logic to pulseview.mk to disable them if needed.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>