added SLC6 to .gitignore

From: Marco Clemencic <marco.clemencic@cern.ch>


git-svn-id: svn+ssh://svn.cern.ch/reps/gaudi/Gaudi/trunk@6900 53ecefc3-a64d-0410-9bdf-b8581fa3287e

.gitignore

@@ -14,10 +14,10 @@ InstallArea/
 patches/
 test_results/
 
-*-slc5-*/
+*-slc[56]-*/
 i686-winxp-vc9-dbg/
 
-.*-slc5-*.d/
+.*-slc[56]-*.d/
 .i686-winxp-vc9-dbg.d/
 
 DoxyWarnings.log