RFR: JDK-8129969: Switch JPRT configuration to use devkits for Windows and Macosx

[Tim Bell]

Erik:

> Please review this change for the Oracle internal JPRT configuration 
> for building jdk9. This change flips the switch for JPRT to start 
> using devkits for building jdk9 on Windows and Macosx, instead of 
> preinstalled versions of Visual Studio and Xcode. The versions of the 
> compilers stay the same for now, so nothing should really change in 
> the product. Making this change will make it much easier to change 
> compiler versions in the future.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8129969

Very nice.  Looks good to me.

Tim


> Patch:
>
> diff -r 2f143b1e68d5 make/jprt.properties
> --- a/make/jprt.properties
> +++ b/make/jprt.properties
> @@ -123,11 +123,13 @@
>      ${my.i586.default.build.configure.args}                \
>      ${jprt.productOpen.build.configure.args}
>
> -jprt.windows_i586_6.2.build.configure.args= \
> - --with-toolchain-version=2013 \
> +jprt.windows_i586.build.configure.args= \
> +    --with-devkit=$VS2013_HOME \
>      ${jprt.i586.build.configure.args}
> -jprt.windows_x64_6.2.build.configure.args= \
> -    --with-toolchain-version=2013
> +jprt.windows_x64.build.configure.args= \
> +    --with-devkit=$VS2013_HOME
> +jprt.macosx_x64.build.configure.args= \
> +    --with-devkit=$XCODE_511_HOME
>
>  ########
>  #
>