[aur-general] merge request: avr32 toolchain

[Andre Bartke]

Please merge

avr32_gnu_toolchain [1] and cross-avr32-gnu-toolchain [2]

into avr32-gnu-toolchain [3]

avr32-gnu-toolchain complies more or less with the recommended cross 
compiling tools package guidelines:

https://wiki.archlinux.org/index.php/Cross_Compiling_Tools_Package_Guidelines

cross-avr32-gnu-toolchain: my old version
avr32_gnu_toolchain: not mine, but out of date since 2011-05-03

[1] https://aur.archlinux.org/packages/avr32_gnu_toolchain/
[2] https://aur.archlinux.org/packages/cross-avr32-gnu-toolchain/
[3] https://aur.archlinux.org/packages/avr32-gnu-toolchain/