Support for E2K (Elbrus 2000) architecture

[antonbashir]

Hi there. I suggest adding support for e2k architecture.

Currently when building some projects like netty, i'm getting this:

admin@srv-e2k-01:~/netty$ mvn compile
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Detecting the operating system and CPU architecture
[INFO] ------------------------------------------------------------------------
[INFO] os.detected.name: linux
[INFO] os.detected.arch: unknown
[INFO] os.detected.bitness: 64
[INFO] os.detected.version: 5.4
[INFO] os.detected.version.major: 5
[INFO] os.detected.version.minor: 4
[ERROR] unknown os.arch: e2k -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MavenExecutionException

[trustin]

Thanks a lot, @antonbashir !