clang-format: Don't add spaces in foreach macro definition.

Before clang-format would e.g. add a space into

   #define Q_FOREACH(x, y)

which turns this into a non-function-like macro.

Patch by Strager Neds, thank you!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@239513 91177308-0d34-0410-b5e6-96231b3b80d8