Plugin downloads wrong arch on PPC machine

[akatona84]

The detection of the architecture is not considering power pc machines.

gradle-node-plugin/src/main/kotlin/com/github/gradle/node/util/PlatformHelper.kt

Line 28 in 7df7dae

else -> "x86"

[deepy]

None of us have access to a power pc machine, but if you can provide what java says for os.name and os.arch and what the result of uname -m is we can easily add it

gradle-node-plugin/src/test/groovy/com/github/gradle/node/util/PlatformHelperTest.groovy

Lines 26 to 35 in 7df7dae

	where:
	osProp | archProp | osName | osArch | isWindows
	'Windows 8' | 'x86' | 'win' | 'x86' | true
	'Windows 8' | 'x86_64' | 'win' | 'x64' | true
	'Mac OS X' | 'x86' | 'darwin' | 'x86' | false
	'Mac OS X' | 'x86_64' | 'darwin' | 'x64' | false
	'Linux' | 'x86' | 'linux' | 'x86' | false
	'Linux' | 'x86_64' | 'linux' | 'x64' | false
	'SunOS' | 'x86' | 'sunos' | 'x86' | false
	'SunOS' | 'x86_64' | 'sunos' | 'x64' | false

[akatona84]

uname -m gives you ppc64le, I've asked to check os.arch which was the same (ppc64le), but didn't ask to check os.name property, it must be linux though. Will check just to be sure

[akatona84]

Output of:

	System.out.println(System.getProperties().get("os.name"));
	System.out.println(System.getProperties().get("os.arch"));

is:

Linux
ppc64le

[akatona84]

Thanks for merging!