editorconfig: xsl files now also use 4 space indentation

Change-Id: I0368f56d1846731d4ec6453aa967cb4907f7df69
Reviewed-on: https://gerrit.libreoffice.org/45633Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

.editorconfig

@@ -11,7 +11,7 @@ charset = utf-8
 trim_trailing_whitespace = true
 
 # Source code files
-[*.{c,cxx,cpp,h,hxx,hpp,java,py}]
+[*.{c,cxx,cpp,h,hxx,hpp,java,py,xsl}]
 indent_style = space
 indent_size = 4
 
@@ -23,7 +23,3 @@ trim_trailing_whitespace = false
 # Patch files
 [*.patch.*]
 trim_trailing_whitespace = false
-
-# XSL files
-[*.xsl]
-indent_style = tab