add las tools cmake

SuperBuild/cmake/External-LAStools.cmake

@@ -0,0 +1,27 @@
+set(_proj_name las-tools)
+set(_SB_BINARY_DIR "${SB_BINARY_DIR}/${_proj_name}")
+
+ExternalProject_Add(${_proj_name}
+  PREFIX            ${_SB_BINARY_DIR}
+  TMP_DIR           ${_SB_BINARY_DIR}/tmp
+  STAMP_DIR         ${_SB_BINARY_DIR}/stamp
+  #--Download step--------------
+  DOWNLOAD_DIR      ${SB_DOWNLOAD_DIR}
+  URL               http://lastools.org/download/LAStools.zip
+  URL_MD5           fc9800fd41158ad873d999a3a18e312e
+  #--Update/Patch step----------
+  UPDATE_COMMAND    ""
+  #--Configure step-------------
+  SOURCE_DIR        ${SB_SOURCE_DIR}/${_proj_name}
+  CONFIGURE_COMMAND ""
+  WORKING_DIRECTORY "${SB_SOURCE_DIR}/${_proj_name}"
+  #--Build step-----------------
+  BUILD_IN_SOURCE 1
+  #--Install step---------------
+  INSTALL_DIR       ${SB_INSTALL_DIR}
+  INSTALL_COMMAND ""
+  #--Output logging-------------
+  LOG_DOWNLOAD      OFF
+  LOG_CONFIGURE     OFF
+  LOG_BUILD         OFF
+)