On Windows, default slice2java not found with 32-bit JDK

Affects v1.4.6

When using a 32-bit JDK with a default Ice installation (C:\Program Files\ZeroC\Ice-3.7.x), the builder fails with the following error message:

A problem occurred evaluating script.
> slice2java (\bin\slice2java.exe) not found. Please ensure that Ice is installed and the iceHome property () is correct.

This occurs because:

the builder looks for the default Ice installation in the Windows registry using the \HKLM\SOFTWARE\ZeroC\Ice* keys
with Ice 3.7.x, the MSI installer is a 64-bit installer that creates keys in \HKLM\SOFTWARE\ZeroC\Ice* but not \HKLM\SOFTWARE\WOW6432Node\ZeroC

Note that Ice 3.6 creates Windows registry entries in \HKLM\SOFTWARE\WOW6432Node\ZeroC, so in 32-bit mode, the gradle plugin will find Ice 3.6 but not Ice 3.7 when iceHome/ICE_HOME is not set.

zeroc-ice / ice-builder-gradle

On Windows, default slice2java not found with 32-bit JDK #8