Unofficial Go 1.5.2 linux/arm tarballs are finally available. Due to changes in the Go 1.5 release process only ARMv6 builds are available. ARMv6 builds are upwardly compatible with ARMv7.
dave.cheney.net/unofficial-arm-tarballs
These builds have been tested on various Raspberry Pi models and should work on most Debian multiarch based systems. Please report success/failure on golang/go#13066 for details.