indent(1): Don't newline on cpp lines like #endif unless -bacc is on.

Reference:
https://github.com/pstef/freebsd_indent/commit/01f36f4141c71754b3a73a91886fb425bab0df3e

Differential Revision: https://reviews.freebsd.org/D6966 (Partial)
Submitted by: Piotr Stefaniak