benchpar.c is compiled when configure --enable-build-all --enable-paralllel.
But it failed to compile. It is decided to retire or move it to example.
I removed it from the PARA_BUILD_ALL list so that --enable-build-all will
not fail. The program file still need to be moved.
Tested: Koala using --enable-build-all --enable-parallel.
--in parallel mode.This line, and those below, will be ignored--
M perform/Makefile.in
M perform/Makefile.am