Port to hosts whose 'sort' and 'tail' implementations treat operands with leading '+' as file names...

Port to hosts whose 'sort' and 'tail' implementations
	treat operands with leading '+' as file names, as POSIX
	has required since 2001.  However, make sure the code still
	works on pre-POSIX hosts.
	* libjava/classpath/ltmain.sh: Don't assume "sort +2" is
	equivalent to "sort -k 3", since POSIX 1003.1-2001 no longer
	requires this.
	This uses the same fix that is already in
	libjava/libltdl/ltmain.sh.

From-SVN: r115271

libjava/classpath/ltmain.sh

@@ -3839,7 +3839,13 @@ extern \"C\" {
 	    fi
 
 	    # Try sorting and uniquifying the output.
-	    if grep -v "^: " < "$nlist" | sort +2 | uniq > "$nlist"S; then
+	    if grep -v "^: " < "$nlist" |
+		if sort -k 3 </dev/null >/dev/null 2>&1; then
+		  sort -k 3
+		else
+		  sort +2
+		fi |
+		uniq > "$nlist"S; then
 	      :
 	    else
 	      grep -v "^: " < "$nlist" > "$nlist"S