Link cmake-mode.el source file next to compiled one.

Fix as per emacsen policy 5C. Thanks to Kevin Ryde.

(Closes: #710570)

debian/changelog

@@ -8,6 +8,8 @@ cmake (2.8.12-0r1) UNRELEASED; urgency=low
     all its dependencies appear to be licence compatible. The main reason for
     the switch is that OpenSSL variant appear to be less troublesome.
     (Closes: #716798)
+  * Follow emacsen policy 5C and link cmake-mode.el source file next to
+    compiled one. Thanks to Kevin Ryde. (Closes: #710570)
 
  -- Modestas Vainius <modax@debian.org>  Sun, 03 Nov 2013 12:28:06 +0200
 

debian/cmake-data.emacsen-install

@@ -14,12 +14,15 @@ if [ ${FLAVOR} != emacs ]; then
   echo install/${PACKAGE}: Byte-compiling for ${FLAVOR}
 
   install -m 755 -d ${ELCDIR}
-  cd ${ELDIR}
-  cp ${ELFILE} ${ELCDIR}
+
+  # Source file symlink (emacsen policy 5C)
+  ln -s "${ELDIR}/${ELFILE}" "${ELCDIR}/${ELFILE}"
+
+  # Compile cmake-mode.el
   cd ${ELCDIR}
   cat << EOF > path.el
 (setq load-path (cons "." load-path) byte-compile-warnings nil)
 EOF
   ${FLAVOR} ${FLAGS} ${ELFILE}
-  rm -f ${ELFILE} path.el
+  rm -f path.el
 fi