RFR: 8151630 and 8151631 ios build failures after b106 merge

[Gary Adams]

Here are two quick fixes for ios build issues after the b106 merge

A quick workaround for the ios build issue with upack executable is to noop
the launcher makefile, similar to what has been done for other launcher 
makefiles.
A longer term solution will be added later with a proper configure flag 
to disable
building command line launchers.

The ios-arm64 (aka aarch64 zero vm) needs template files for UnixConstants
and SocketOptionRegistry. It was using the ios-arm templates. Rather than
complicate the makefiles the ios-arm files have been cloned.

   Webrev: http://cr.openjdk.java.net/~gadams/8151631/webrev.00/
    JIRA:
        https://bugs.openjdk.java.net/browse/JDK-8151630?filter=-1
        https://bugs.openjdk.java.net/browse/JDK-8151631?filter=-1