Improvements to function type and ObjC block formatting.

Improvements to function type and ObjC block formatting.

Before: int (^myBlock) (int) = ^(int num) {}
        A<void ()>;
	int (*b)(int);

After:  int (^myBlock)(int) = ^(int num) {}
        A<void()>;
	int(*b)(int);

For function types and function pointer types, this patch only makes
the behavior consistent (for types that are keywords and other types).
For the latter function pointer type declarations, we'll probably
want to add a space after "int".

Also added LangOpts.Bool = 1, so we handle "A<bool()>" appropriately
Moved the LangOpts-settings to a public place for use by tests
and clang-format binary.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172065 91177308-0d34-0410-b5e6-96231b3b80d8