clang-format: Correctly identify multiplications in braces init lists.

Before:
  int i{a *b};

After:
  int i{a * b};

Also fix unrelated issue where braced init lists were counted as blocks
and prevented single-line functions.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@209412 91177308-0d34-0410-b5e6-96231b3b80d8