Clean up formatting of function types.

Before:
int (*func)(void*);
void f() { int(*func)(void*); }

After (consistent space after "int"):
int (*func)(void*);
void f() { int (*func)(void*); }

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@182756 91177308-0d34-0410-b5e6-96231b3b80d8