support armbian?

[fz420]

root @ aml in ~ |23:38:58 
$ goup version
goup version v0.1.6

root @ aml in ~ |23:39:46 
$ uname -a
Linux aml 5.0.2-aml-s905 #5.77 SMP PREEMPT Mon Apr 1 17:23:16 MSK 2019 aarch64 aarch64 aarch64 GNU/Linux

root @ aml in ~ |23:39:51 
$ lscpu
Architecture:        aarch64
Byte Order:          Little Endian
CPU(s):              4
On-line CPU(s) list: 0-3
Thread(s) per core:  1
Core(s) per socket:  4
Socket(s):           1
Vendor ID:           ARM
Model:               4
Model name:          Cortex-A53
Stepping:            r0p4
CPU max MHz:         1512.0000
CPU min MHz:         100.0000
BogoMIPS:            48.00
L1d cache:           unknown size
L1i cache:           unknown size
L2 cache:            unknown size
Flags:               fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
root @ aml in ~ |23:39:52

The version check on armbian results in armv6l and the downloaded go does not work.

Modify the following file, recompile the downloaded go, and fix the problem.

modify   internal/commands/install.go
# line 597
# arch = "armv6l"
arch = "arm64"