The logger pmda now builds outside of the pcp source tree.
* pcp/.gitignore: New file.
* pcp/config.guess: Ditto.
* pcp/config.sub: Ditto.
* pcp/configure.in: Ditto.
* pcp/install-sh: Ditto.
* pcp/src/include/.gitignore: Ditto.
* pcp/src/include/builddefs.in: Ditto.
* pcp/src/include/buildrules: Ditto.
* pcp/src/pmdas/logger/.gitignore: Updated.
* pcp/src/pmdas/logger/GNUmakefile: Modified to build either in the pcp
source tree or separately.
* pcp/src/pmdas/logger/Install: Updated.
* pcp/src/pmdas/logger/percontext.c: Updated include file paths.