new upstream version 0.10.4

made following changes:

for 0.8.4

• updated soversion to 7
• removed additional build flag for 32-bit arch
• added autopkgtests suite to run upstream tests

for 0.10.0

• updated soversion to 9

for 0.10.4

• update testsuite for autopkgtest

@NyxTrail

Note: run gbp import-orig --uscan before merging