Make sure to bufferize ALS/GLS logs

And clean the old .txt logs (old naming scheme) too when necessary, not
only the .log files.

For eng/ide/ada_language_server#143

Author: AnthonyLeonardoGracio

source/ada/lsp-ada_driver.adb

@@ -394,7 +394,8 @@ begin
                  ">"
                  & (if VSS.Command_Line.Is_Specified (Language_GPR_Option)
                     then "gpr_ls" else "ada_ls")
-                 & "_log.$T.log:buffer_size=0" & Ada.Characters.Latin_1.LF
+                 & "_log.$T.log:buffer_size=0:buffer_size=0"
+                 & Ada.Characters.Latin_1.LF
                  & "ALS.MAIN=yes" & Ada.Characters.Latin_1.LF
                  & "ALS.IN=no" & Ada.Characters.Latin_1.LF
                  & "ALS.OUT=no" & Ada.Characters.Latin_1.LF;

source/ada/lsp-ada_handlers.adb

@@ -237,7 +237,9 @@ package body LSP.Ada_Handlers is
       --  Browse the log files in reverse timestamp order
       for F of reverse Files.all loop
          --  Filter out files like traces.cfg
-         if GNATCOLL.Utils.Ends_With (+F.Base_Name, ".log") then
+         if GNATCOLL.Utils.Ends_With (+F.Base_Name, ".log")
+           or else GNATCOLL.Utils.Ends_With (+F.Base_Name, ".txt")
+         then
             Cpt := Cpt + 1;
             --  Delete the old logs
             if Cpt > Self.Configuration.Log_Threshold then