(c-indent-one-line-block): New indentation functions.
(c-semi&comma-no-newlines-before-nonblanks)
(c-semi&comma-no-newlines-for-oneline-inliners): New functions.
(c-lineup-dont-change): New lineup function that leaves the current
line's indentation unchanged. Used for the new cpp-macro-cont
syntactic symbol.