Revert "Merging r198940:"

This reverts commit r206064.

This commit regressed the MultiSource/Applications/sgefa/sgefa test.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_34@206783 91177308-0d34-0410-b5e6-96231b3b80d8
Merging r198940 (second try):

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r198940 | kristof.beyls | 2014-01-10 08:44:34 -0500 (Fri, 10 Jan 2014) | 2 lines

Enable -fuse-init-array for all AArch64 ELF targets by default, not just linux.

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git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_34@207288 91177308-0d34-0410-b5e6-96231b3b80d8