DominatorTreeTest.cpp: Add the file header.

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Whitespace.

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Untabify.

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IRTests/ConstantsTest.cpp: AsInstructionsTest: Delete each instruction immediately if it is not linked.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173236 91177308-0d34-0410-b5e6-96231b3b80d8
IRTests/IRBuilderTest.cpp: Let GV added to the module.

It fixes --vg-leak.

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