Don't generate util/fingerprint_impl.hpp in source tree

cmake/FingerPrint-Config.cmake

@@ -1,6 +1,6 @@
-set(OLDFILE ${SOURCE_DIR}/util/fingerprint_impl.hpp)
+set(OLDFILE ${OUTPUT_DIR}/util/fingerprint_impl.hpp)
 set(NEWFILE ${OLDFILE}.tmp)
-set(INFILE ${OLDFILE}.in)
+set(INFILE ${SOURCE_DIR}/util/fingerprint_impl.hpp.in)
 file(MD5 ${SOURCE_DIR}/prepare.cpp MD5PREPARE)
 file(MD5 ${SOURCE_DIR}/data_structures/static_rtree.hpp MD5RTREE)
 file(MD5 ${SOURCE_DIR}/util/graph_loader.hpp MD5GRAPH)
@@ -13,7 +13,7 @@ file(MD5 ${NEWFILE} MD5NEW)
 if (EXISTS ${OLDFILE})
     file(MD5 ${OLDFILE} MD5OLD)
     if(NOT ${MD5NEW} STREQUAL ${MD5OLD})
-	    file(REMOVE_RECURSE ${OLDFILE})
+        file(REMOVE_RECURSE ${OLDFILE})
         file(RENAME ${NEWFILE} ${OLDFILE})
     else()
         file(REMOVE_RECURSE ${NEWFILE})