Fix typo in variable name

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@193155 91177308-0d34-0410-b5e6-96231b3b80d8
[PECOFF] Fix /manifestuac handling.

uiAccess argument's type is not really boolean. It's string.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@193171 91177308-0d34-0410-b5e6-96231b3b80d8
[PECOFF] /manifestuac option is case insensitive.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@193173 91177308-0d34-0410-b5e6-96231b3b80d8