RFR: 8257905: Make fixpath.sh more liberal in accepting paths embedded in arguments [v2]

[Erik Joelsson]

On Tue, 8 Dec 2020 16:40:26 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

>> When calling a Windows tool that needs an argument on the form `-option/a:/home/ihse/myjdk/...`, fixpath gets confused and thinks `/a:/home/ihse/myjdk` is a unix path, notices that it does not exists, and stops trying to convert the path. 
>> 
>> Instead it needs to recheck for paths after a separator such as `:` or `=`.
>
> Magnus Ihse Bursie has updated the pull request incrementally with one additional commit since the last revision:
> 
>   The same fix is also needed for the $DRIVEPREFIX regex

Marked as reviewed by erikj (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/1698