Fix Windows build issues for LLVM.

Remove HAVE_SYS_UIO_H redefinition due to Windows build conflicts.
Add dependency on imagehlp.lib/dll.

Change-Id: I41cb9331c1fbde849ff9dc6906cbe9d8ae6bbc50
Merge tag 'android-4.3_r3.1' of https://android.googlesource.com/platform/external/llvm into cm-10.2

Android 4.3 Release 3.1
Merge remote-tracking branch 'upstream/cm-10.2' into cm-10.2