Handle Windows line endings in tag-html test

Author: dpaoliello

llvm/test/tools/llvm-rc/tag-html.test

@@ -1,5 +1,6 @@
 ; RUN: rm -rf %t && mkdir %t && cd %t
 ; RUN: cp %p/Inputs/webpage*.html .
+; RUN: dos2unix webpage*.html
 ; RUN: llvm-rc -no-preprocess /FO %t/tag-html.res -- %p/Inputs/tag-html.rc
 ; RUN: llvm-readobj %t/tag-html.res | FileCheck %s --check-prefix HTML