fixed a typo

cmake/make_debian_package.sh.in

@@ -40,7 +40,7 @@ cd debian_package
 # lowecasepackagenname_package.ver.sion
 #Note, we first clone and then checkout the tag because the old git version on
 #Ubuntu12.4 does not support to do it in one go.
-BUILD_DIR_NAME=@PACKAGE_BASE_NAME@_ @PACKAGE_MAJORMINOR_VERSION@-${PROJECT_BUILDVERSION}-@PACKAGE_PATCH_VERSION@
+BUILD_DIR_NAME="@PACKAGE_BASE_NAME@_@PACKAGE_MAJORMINOR_VERSION@-${PROJECT_BUILDVERSION}-@PACKAGE_PATCH_VERSION@"
 git clone @CMAKE_SOURCE_DIR@ ${BUILD_DIR_NAME}
 ( cd  ${BUILD_DIR_NAME} &&\
   git checkout @PACKAGE_TAG_VERSION@ &&\