Fix a link issue I ran into trying compiling LLVM on MinGW with CMake.  
Hopefully this doesn't break anyone else's build... it shouldn't unless 
the MinGW variable means something other than compiling with MinGW.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60273 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/cmake/modules/AddLLVM.cmake b/cmake/modules/AddLLVM.cmake
index 85e6230..13ecc37 100755
--- a/cmake/modules/AddLLVM.cmake
+++ b/cmake/modules/AddLLVM.cmake
@@ -31,7 +31,7 @@
   else( MSVC )
     add_dependencies(${name} llvm-config.target)
     if( MINGW )
-      target_link_libraries(${name} DbgHelp psapi)
+      target_link_libraries(${name} imagehlp psapi)
     elseif( CMAKE_HOST_UNIX )
       target_link_libraries(${name} dl)
     endif( MINGW )