Make copy of flags before passing it to TestCompiler
Make copy of flags before passing it to TestCompiler

We are adding to the flags in the TestCompiler function and are duplicating flags since we might call it again.
Review URL: https://codereview.chromium.org//10944034

git-svn-id: c93d8a2297af3b929165606efe145742a534bc71@12579 260f80e4-7a28-3924-810f-c04153c831b5

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