Allow *.cc files to be linked into flash by default (#6100)
Allow *.cc files to be linked into flash by default (#6100)

Fixes #6096
sticilface/Arduino,esp8266/Arduino,sticilface/Arduino,esp8266/Arduino,sticilface/Arduino,sticilface/Arduino,esp8266/Arduino,esp8266/Arduino,sticilface/Arduino,esp8266/Arduino