[Bug target/71151] [avr] -fmerge-constants and -fdata-sections/-ffunction-sections results in string constants in .progmem.gcc_sw section

[saaadhu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151

--- Comment #21 from Senthil Kumar Selvaraj <saaadhu at gcc dot gnu.org> ---
It occurs with "7.0.0 20160824 (experimental) (GCC)". Besides, the errors go
away if I remove --relax, so I think it's a linker issue.