message catalogs: fix comment lines, also remove linux hack in merge.c

According to the spec, blank lines in message catalogs or lines
beginning with '$ ' are valid comments.

However, there were many cases where lines in the message catalogs
contained just a single '$', without the required space after it.

Under linux, this caused 126766 error lines (in my builds) of the
form:

... unknown directive `': line ignored

This also causes gencat to exit with a non-0 exit code.  Even though
gencat says it ignores the line, it really doesn't.

An early porting change to programs/localized/util/merge.c was made to
ignore this return value on linux.  This hack has now been removed.

Build logs are a lot smaller and cleaner now.

cde/programs/localized/ja_JP.dt-eucJP/app-defaults/Dtimsstart.tmsg

@@ -22,138 +22,138 @@ $ *                         \ (at end of line)  continue on same line
 $ *
 $ *****************************************************************************
 $ ----------------------------------------------------------------------------
-$
+$ 
 $ font list
 $ "NEW-"
 1 -dt-interface user-medium-r-normal-m*-*-*-*-*-m-*:
-$
+$ 
 $ title bar title
 $ "NEW-"
 2 dtimsstart
-$
+$ 
 $ Selection title
 $ "NEW-"
 3 入力メソッド選択
-$
+$ 
 $ Host title
 $ "NEW-"
 4 ホスト変更
-$
+$ 
 $ Mode title
 $ "NEW-"
 5 入力メソッド選択モード
-$
+$ 
 $ OK button label
 $ "NEW-"
 6 了解
-$
+$ 
 $ Clear button label
 $ "NEW-"
 7 消去
-$
+$ 
 $ Cancel button label
 $ "NEW-"
 8 取消し
-$
+$ 
 $ Change Host button label
 $ "NEW-"
 9 ホスト変更
-$
+$ 
 $ Help button label
 $ "NEW-"
 10 ヘルプ
-$
+$ 
 $ selection dialog border width
 $ "NEW-"
 11 3
-$
+$ 
 $ host dialog border width
 $ "NEW-"
 12 3
-$
+$ 
 $ XmDialogShell border width
 $ "NEW-"
 13 0
-$
+$ 
 $ cmd_rc default spacing (margin width)
 $ "NEW-"
 14 10
-$
+$ 
 $ cmd_rc default spacing 
 $ "NEW-"
 15 10
-$
+$ 
 $ Selection dialog cmd_rc (margin width)
 $ "NEW-"
 16 4
-$
+$ 
 $ Selection dialog OK margin width
 $ "NEW-"
 17 16
-$
+$ 
 $ Selection dialog cmd_rc default spacing 
 $ "NEW-"
 18 40
-$
+$ 
 $ Change Host dialog label
 $ "NEW-"
 19 Hostname:
-$
+$ 
 $ Change Host dialog alignment
 $ "NEW-"
 20 XmALIGNMENT_BEGINNING
-$
+$ 
 $ Change Host dialog left margin
 $ "NEW-"
 21 20
-$
+$ 
 $ Change Host dialog right margin
 $ "NEW-"
 22 20
-$
+$ 
 $ Enter hostname label
 $ "NEW-"
 23  \
 登録されている入力メソッドのサーバが示されて\\n \
 いるところにホスト名を入力してください。\\n \
 空のホスト名はローカル・ホストを意味します。
-$
+$ 
 $ Host text max length
 $ "NEW-"
 24 63
-$
+$ 
 $ Host text number of columns
 $ "NEW-"
 25 14
-$
+$ 
 $ host_rc margin width
 $ "NEW-"
 26 60
-$
+$ 
 $ host cmd_rc margin width
 $ "NEW-"
 27 20
-$
+$ 
 $ host cmd_rc spacing
 $ "NEW-"
 28 90
-$
+$ 
 $ selection mode button0 label string
 $ "NEW-"
 29 Ask at login
-$
+$ 
 $ selection mode button1 label string
 $ "NEW-"
 30 Resume current input method
-$
+$ 
 $ mode cmd_rc spacing
 $ "NEW-"
 31 50
-$
+$ 
 $ mode cmd_rc margin width
 $ "NEW-"
 32 20
-$
+$ 
 $ Input method selection help
 $ "NEW-"
 33 \\n \
@@ -181,7 +181,7 @@ $ "NEW-"
 	することができます。そのためには、アプリケーション・マネージャの\\n \
 	デスクトップ・ツールにある 'DtImsMode' を実行し、ダイアログ・ウィン\\n \
         ドウの [現在の入力メソッドの回復] を選択します。\\n \
-$
+$ 
 $ Input method selection mode help
 $ "NEW-"
 34 \\n \
@@ -202,5 +202,5 @@ $ "NEW-"
       [取消し];    変更を無効にし、ウィンドウを閉じます。\\n \
 \\n \
       [ヘルプ]:    このメッセージを表示します。\\n \
-$
-$
+$ 
+$