Fixed System.getEnv() test on iOS.
Fixed System.getEnv() test on iOS.

	Change on 2016/05/24 by tball <tball@google.com>

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=123146187

doppllib/j2objc,groschovskiy/j2objc,lukhnos/j2objc,groschovskiy/j2objc,google/j2objc,bandcampdotcom/j2objc,bandcampdotcom/j2objc,google/j2objc,doppllib/j2objc,bandcampdotcom/j2objc,Buggaboo/j2objc,mirego/j2objc,mirego/j2objc,groschovskiy/j2objc,doppllib/j2objc,Buggaboo/j2objc,lukhnos/j2objc,mirego/j2objc,life-beam/j2objc,mirego/j2objc,life-beam/j2objc,google/j2objc,doppllib/j2objc,Buggaboo/j2objc,mirego/j2objc,Buggaboo/j2objc,bandcampdotcom/j2objc,bandcampdotcom/j2objc,mirego/j2objc,life-beam/j2objc,google/j2objc,life-beam/j2objc,groschovskiy/j2objc,lukhnos/j2objc,google/j2objc,doppllib/j2objc,bandcampdotcom/j2objc,Buggaboo/j2objc,groschovskiy/j2objc,groschovskiy/j2objc,google/j2objc,doppllib/j2objc,lukhnos/j2objc,life-beam/j2objc,lukhnos/j2objc,life-beam/j2objc,lukhnos/j2objc,Buggaboo/j2objc