[OpenJDK 2D-Dev] RFR: JDK-8196724: Change macosx deployment target to 10.9

[Tim Bell]

Erik:

> This patch changes the values for the macosx version min and max
> settings from 10.7 to 10.9. It also changes the stdlib from libstdc++ to
> libc++ (explicitly for Hotspot and implicitly everywhere else). This
> change is necessary to keep up with newer toolchain versions on Macosx
> where using the old and no longer maintained libstdc++ has been
> deprecated. This is done in preparation for bumping the preferred Xcode
> version used for builds at Oracle.
>
> The switch has been tested for both Hotspot and client.
>
> The switch triggered some new deprecation warnings which have been
> silenced and followup bugs have been filed on the concerned team.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8196724
>
> Webrev: http://cr.openjdk.java.net/~erikj/8196724/webrev.01/index.html

Looks good.

/Tim