JavaCall does not work with 32 bit Julia on Windows

[aviks]

Representative error: https://ci.appveyor.com/project/aviks/javacall-jl/build/1.0.42/job/8tjh878bbqf2h2dl

cc: @AndyGreenwell you've done some investigation around this i believe?

[AndyGreenwell]

I get the same error: https://gist.github.com/AndyGreenwell/f0aff057e6d25a37609cae9c64ec837e

Setup under test:

• Windows 7 32-bit
• Julia 0.4.5
• JavaCall master with the PR that uses WinReg.jl
• JDK 1.8.0_77

[PallHaraldsson]

How serious is (and difficult to fix) is non-32-bit support? [I guess this is independent of Windows.]

Most ARM CPUs are non-64-bit, whether of non-Android Linux or Windows Phone (I guess it doesn't have JVM..). [I'm thinking of getting an ARM Linux (not Android, or possibly for both..). I do not care for, but others might: 32-bit [Windows] CPUs are on the way out, so maybe not too limiting there. Still, thought JDBC.jl was a nice option..]

[Yes, Dalvik is not that JVM. JavaCall doesn't support that or ART, is there an alternative, in that case? I'm not sure if similar support to this is needed there (and similar to Objective-C) or if Java code there would call Julia code (through JNI).]

[mkitti]

I managed to get JavaCall.init() to work as well as few calls to function on x86 Windows:
https://ci.appveyor.com/project/mkitti/javacall-jl/builds/32767716/job/6mog0jrkqc6s5ea0

This corresponds to 078278e