RFR: JDK-8029908: jdk 8u5 mac build produces incorrect version string 1.8.0_5

[Tim Bell]

Hi Erik:

Looks good to me for JDK 9.

Tim

> I'm not sure if this requires a new review, but I would like to 
> forward port this fix to jdk9.
>
> /Erik
>
> On 2013-12-13 10:07, Erik Joelsson wrote:
>> Hello,
>>
>> Please review this simple little workaround for jdk-update-version. 
>> On macosx 10.7, the expr command is broken and the following will not 
>> work as on other platforms (or macosx 10.8):
>>
>> expr "--with-update-version=05" : '[^=]*=\(.*\)'
>>
>> On the other platforms, this will return "05" but on 10.7 it returns 
>> "5". Autoconf uses this construct to parse command line parameters. 
>> Because of this, we are unable to assign the value "05" to 
>> --jdk-update-version.
>>
>> Since in the build, we always treat the update version as 2 digits, 
>> the simple workaround is to zero pad the value for this variable if 
>> it is only one character long.
>>
>> Webrev: http://cr.openjdk.java.net/~erikj/8029908/webrev.root.01/
>>
>> /Erik
>