add test codes
use := instead of ?= because ?= does not work if PKG_CONFIG_PATH exists and openrtm.pc or openhrp3.pc are not included in PKG_CONFIG_PATH ;; I does not work groovy+rosbuild environment
set PKG_CONFIG_PATH before rosmake test to find openhrp3.1.pc and hrpsys-base.pc
use load_manifest for rosbuild
Merge pull request #53 from k-okada/failed_to_compile_using_rosbuild_52

- add test codes
- merge #39
- fix PKG_CONFIG_PATH before rostest
- use load_manifest for rosbuild