Log Message:
Import ucpp version 1.3.
Based on PR 31480 by Jeroen Ruigrok van der Werven,
fixed manual page installation path.

ucpp is a C preprocessor and lexer. It has the following goals:

   - Strict conformance to the C99 standard (with switches to
     disable some extensions and mimic C90 behaviour)
   - Low memory consumption
   - Possibility to use the code as a lexer (that outputs tokens
     directly)