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.
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.