Add arm64 Docker image (with NVIDIA GPU support)

[claudioandre-br]

1. Is your feature request related to a problem? Please describe.

Sooner or later ARM will be (perhaps already is) a very important player even in the cloud.

2. Describe the solution you'd like

Real build based on NVIDIA ARM64 Docker image.

Target CPU ......................................... aarch64 ASIMD, 64-bit LE
AES-NI support ..................................... no
Target OS .......................................... linux-gnu
Cross compiling .................................... no
Legacy arch header ................................. arm64le.h

Optional libraries/features found:
Memory map (share/page large files) ................ yes
Fork support ....................................... yes
OpenMP support ..................................... yes (not for fast formats)
OpenCL support ..................................... yes
Generic crypt(3) format ............................ yes
OpenSSL (many additional formats) .................. yes
libgmp (PRINCE mode and faster SRP formats) ........ yes
128-bit integer (faster PRINCE mode) ............... yes
libz (7z, pkzip and some other formats) ............ yes
libbz2 (7z and gpg2john bz2 support) ............... yes
libpcap (vncpcap2john and SIPdump) ................. yes
Non-free unrar code (complete RAR support) ......... yes
librexgen (regex mode, see doc/README.librexgen) ... no
OpenMPI support (default disabled) ................. no
Experimental code (default disabled) ............... no
ZTEX USB-FPGA module 1.15y support ................. no