Ignore the .svn directory when installing TR1 headers.

[SVN r49318]

Jamroot

@@ -371,7 +371,7 @@ local headers =
     # see http://lists.boost.org/Archives/boost/2007/05/121430.php
     [ path.glob-tree $(BOOST_ROOT)/boost : *.hpp *.ipp *.h *.inc *.SUNWCCh : CVS .svn ]
     [ path.glob-tree $(BOOST_ROOT)/boost/compatibility/cpp_c_headers : c* : CVS .svn ] 
-    [ path.glob boost/tr1/tr1 : * : bcc32 sun CVS ]
+    [ path.glob boost/tr1/tr1 : * : bcc32 sun CVS .svn ]
           ;
 
 # Complete install.