update collada_urdf to use assimp_devel on hydro-devel

from https://github.com/jsk-ros-pkg/jsk_model_tools/issues/20, collada_tools is basically collada_urdf linked with asssimp_devel, here is the PR to do that

this requires following patch on assimp_devel
```
diff --git a/assimp_devel/Makefile b/assimp_devel/Makefile
index 93cf0ab..e17c5fe 100644
--- a/assimp_devel/Makefile
+++ b/assimp_devel/Makefile
@@ -22,6 +22,8 @@ CPU_NUM=$(shell grep -c processor /proc/cpuinfo)
 PARALLEL_JOB=$(shell if `expr $(CPU_NUM) \> 12 > /dev/null`;then echo 12; else echo ${CPU_NUM}; fi)
 assimp_devel: $(GIT_DIR) patched
        cd $(GIT_DIR) && mkdir -p $(BUILDDIR) && cd $(BUILDDIR) && BOOST_INCLUDEDIR=$(BOOST_INCLUDE_DIRS) BOOST_LIBRARYDIR=$(BOOST_LIBRARY_DIRS) cmake -DCMAKE_INSTALL_PREFIX=$(INSTALL_DIR) -DCMAKE_BUILD_TYPE=$(CMAKE_BUILD_TYPE) .. && make -j$(PARALLEL_JOB) install
+ if [ -e $(INSTALL_DIR)/lib/pkgconfig/assimp.pc ]; then mv $(INSTALL_DIR)/lib/pkgconfig/assimp.pc $(INSTALL_DIR)/lib/pkgconfig/assimp_devel.pc ; fi
+ sed -i s@include/assimp@include@g $(INSTALL_DIR)/lib/pkgconfig/assimp_devel.pc
 #      if [ -e $(INSTALL_DIR)/include/assimp3 ]; then rm -rf $(INSTALL_DIR)/include/assimp3; fi
 #      mv $(INSTALL_DIR)/include/assimp $(INSTALL_DIR)/include/assimp3
 #      mv $(INSTALL_DIR)/bin/assimp $(INSTALL_DIR)/bin/assimp_cmd
```