clang-format: If the template list of a variable declaration spans

clang-format: If the template list of a variable declaration spans
multiple lines, also break before the variable name.

Before:
  std::vector<aaaaaa, // wrap
              aa> aaa;

After:
  std::vector<aaaaaa, // wrap
              aa>
      aaa;

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@253871 91177308-0d34-0410-b5e6-96231b3b80d8