Fix expression recognition in for-loops.

Before: for (; a&& b;) {}
After:  for (; a && b;) {}

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181017 91177308-0d34-0410-b5e6-96231b3b80d8
Add space between ; and (.

Before: for (int i = 0;(i < 10); ++i) {}
After:  for (int i = 0; (i < 10); ++i) {}

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181020 91177308-0d34-0410-b5e6-96231b3b80d8