license: update text

Use FILENAME_H as include guard (MISRAC2012-Rule-21.1)

Merge branch 'develop' into a2dp

Conflicts:
example/Makefile.inc
example/sco_demo_util.c
port/pic32-harmony/app.X/nbproject/Makefile-default.mk
port/pic32-harmony/app.X/nbproject/Makefile-genesi

Merge branch 'develop' into a2dp

Conflicts:
example/Makefile.inc
example/sco_demo_util.c
port/pic32-harmony/app.X/nbproject/Makefile-default.mk
port/pic32-harmony/app.X/nbproject/Makefile-genesis.properties
port/pic32-harmony/app.X/nbproject/configurations.xml
port/pic32-harmony/create_examples.py
src/classic/btstack_cvsd_plc.c
src/classic/btstack_sbc_bludroid.c
src/classic/btstack_sbc_plc.c
test/ring_buffer/.gitignore

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sbc decoder: integration with sco_util

example/hsp+hfp: extract SCO test code into sco_demo_util