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/C/app-defaults/Dtfile.tmsg

@@ -28,105 +28,105 @@ $ *****************************************************************************
 $ ----------------------------------------------------------------------------
 $ Menu Accelerators
 $ ----------------------------------------------------------------------------
-$
+$ 
 $ Message 1 3 5 7 9 11 can be translated. These are shown on the menu.
 $ Message 2 4 6 8 10 12 should not be changed unless accelerator keys need to
 $ be changed in your language. If you want to change accelerator, it is
 $ recommended not to change modifier keys.
 $ Example; (Change underlined part only)
-$
+$ 
 $  Menu label "Keyword..." --> "Abcdef..."
-$
+$ 
 $  1 Ctrl+K       -->  1 Ctrl+A
 $         -                   -
 $  2 Ctrl<Key>k   -->  2 Ctrl<Key>a
 $             -                   -
-$
+$ 
 $   Message 1, 2. Menu label is Find.
 $     1 = Text displayed next to Find menu option          
 $     2 = Keys used to accelerate to Find option
-$
+$ 
 1 Ctrl+F
 2 Ctrl<Key>f
 $ 
 $   Message 3, 4. Menu label is Close.
 $     3 = Text displayed next to Close menu option
 $     4 = Keys used to accelerate to Close option
-$
+$ 
 3 Alt+F4
 4 Alt<Key>F4
-$
+$ 
 $   Message 5, 6. Menu label is Home.
 $     5 = Text displayed next to Home menu option
 $     6 = Keys used to accelerate to Home option
-$
+$ 
 5 Ctrl+H
 6 Ctrl<Key>h
-$
+$ 
 $   Message 7, 8. Menu label is Up.
 $     7 = Text displayed next to Up menu option
 $     8 = Keys used to accelerate to Up option
-$
+$ 
 7 Ctrl+U
 8 Ctrl<Key>u
-$
+$ 
 $   Message 9, 10. Menu label is Terminal.
 $      9 = Text displayed next to Terminal menu option
 $     10 = Keys used to accelerate to Terminal option
-$
+$ 
 9 Ctrl+T
 10 Ctrl<Key>t
-$
+$ 
 $   Message 11, 12. Menu label is Show Hidden Files.
 $     11 = Text displayed by Show Hidden Files menu option
 $     12 = Keys used to accelerate to Show Hidden Files option
-$
+$ 
 11 Ctrl+S
 12 Ctrl<Key>s
-$
+$ 
 $ ----------------------------------------------------------------------------
 $ Do not translate message 13.
 $ This is not a message, but locale dependent value.
 $ ----------------------------------------------------------------------------
-$
+$ 
 $ filter_files*file_name_text.columns = 30 for Single-byte
 $                                       15 for Multi-byte
-$
+$ 
 13 30
-$
+$ 
 $ ----------------------------------------------------------------------------
 $ message 14 is used for optional localization.
 $ ----------------------------------------------------------------------------
 14 
-$
+$ 
 $   Message 15, 16. Menu label is Copy 
 $     15 = Text displayed by Copy menu option
 $     16 = Keys used to accelerate to Copy option
-$
+$ 
 15 Ctrl+C
 16 Ctrl<Key>c
-$
+$ 
 $   Message 17, 18. Menu label is Properties
 $     17 = Text displayed by Properties menu option
 $     18 = Keys used to accelerate to Properties option
-$
+$ 
 17 Ctrl+<BackSpace>
 18 Ctrl<Key>osfBackSpace
-$
+$ 
 $   Message 19, 20. Menu label is Select All
 $     19 = Text displayed by Select All menu option
 $     20 = Keys used to accelerate to Select All option
-$
+$ 
 19 Ctrl+/
 20 Ctrl<Key>slash
-$
+$ 
 $   Message 21, 22. Menu label is Unselect All
 $     21 = Text displayed by Unselect All menu option
 $     22 = Keys used to accelerate to Unselect All option
-$
+$ 
 21 Ctrl+\\\\
 22 Ctrl<Key>backslash
-$
+$ 
 $   Message 23 is a window title of root directory.
-$
+$ 
 23 ROOT