libffi-dg.exp (libffi-init): Set ld_library_path to "" before adding paths.

libffi/
	* testsuite/lib/libffi-dg.exp (libffi-init): Set ld_library_path
	to "" before adding paths.  (This reinstates an assignment that
	was removed by my 2009-06-30 commit, but changes the initial
	value from "." to "".)

From-SVN: r149149

libffi/ChangeLog

+2009-07-01  Richard Sandiford  <r.sandiford@uk.ibm.com>
+
+	* testsuite/lib/libffi-dg.exp (libffi-init): Set ld_library_path
+	to "" before adding paths.  (This reinstates an assignment that
+	was removed by my 2009-06-30 commit, but changes the initial
+	value from "." to "".)
+
 2009-07-01  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR testsuite/40601

libffi/testsuite/lib/libffi-dg.exp

@@ -107,6 +107,7 @@ proc libffi-init { args } {
     set blddircxx [lookfor_file [get_multilibs] libstdc++-v3]
     verbose "libstdc++ $blddircxx"
 
+    set ld_library_path ""
     set gccdir [lookfor_file $tool_root_dir gcc/libgcc.a]
     if {$gccdir != ""} {
 	set gccdir [file dirname $gccdir]