Add rules to gitignore

Rule for ctags: Sublime generated(or otherwise) ctags look like
sc/abc/xyz/tags. The present rule cannot look after tags which
are more than 1 directory deep. Hence this change.

Other rules added : Jetbrains Clion, cscope, sublime text specific

Change-Id: I1dbbe4904f3d15bbf198cd372591b464efb3896a
Reviewed-on: https://gerrit.libreoffice.org/31874
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Jaskaran singh <jvsg1303@gmail.com>

.gitignore

@@ -70,7 +70,8 @@
 
 # make tags
 
-/tags
+**/tags
+**/.tags*
 
 # make etags
 /TAGS
@@ -159,4 +160,14 @@ DerivedData
 /.codelite
 *.workspace
 *.workspace.session
-*.tags
+*.tags
+
+# JetBrains Clion Specific
+.idea
+
+# Cscope
+*.out
+
+# Sublime Specific
+*.sublime-project
+*.sublime-workspace