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/zh_TW.dt-eucTW/msg/dtconfig.msg

@@ -20,31 +20,31 @@ $ *****************************************************************************
 
 $set 10
 1 品卒岂仨怅损祁席(superuser)仝如·\n
-$
+$ 
 2 CDE 堍呢菝贴醛涅贴损祁席孽域· 群孽域\n\
 倾朔苡母输摹远损祁席嘻圄墨针享淠<EFBFBD>泣·\n\
 友亦破岩闪圊祈真祁、诶埔恻<EFBFBD>瘼靴锹屿浠怃邛朔苡·\n
-$
+$ 
 3 淘棚如堍呢菝贴醛涅贴损祁席孽域· 群孽域\n\
 倾朔苡母输摹远损祁席嘻圄墨针享淠<EFBFBD>泣·\n\
 友亦破岩闪圊祈真祁、诶埔恻<EFBFBD>瘼靴锹屿浠怃邛朔苡·\n
 4 CDE 呢孱菝贴醛涅贴损祁席孽域·
-$
+$ 
 5 淘棚如呢孱菝贴醛涅贴损祁席孽域·\n
-$
+$ 
 6 祁挝: %s\n\
   -e (邛祁 dtlogin 嘻 auto-start 劈卒)\n\
   -d (探旨 dtlogin 嘻 auto-start 劈卒)\n\
   -kill (勰卩 dtlogin)\n\
   -reset (屿菝 dtlogin - 屿浠<E5B1BF>探刭弭篁)\n
-$
+$ 
 7 糯情趴戆 \n
-$
+$ 
 8  腈友摹远趴戆 \n
-$
+$ 
 9  嘁挝探旨 xdm、铢俣镥 xdm 罾母呶煞喻盆探旨\n\
 xdm 虽锹孳摹裙· \n 
-$
+$ 
 10 Dtlogin 虽栖仝如 \n
 
 $ *****************************************************************************
@@ -52,18 +52,18 @@ $ **  Message set 20: For Sun Platforms
 $ *****************************************************************************
 
 $set 20
-$
+$ 
 1  CDE 刭弭狞祁幔娶
-$
+$ 
 2   %s -d     (探旨 auto-start)
 3   %s -e     (邛祁 auto-start)
 4   %s -kill  (勰卩 dtlogin)
 5   %s -reset (屿菝 dtlogin)
 6   %s -p     (峭闲瘼侬散收浠)
-$
+$ 
 $	In above messages 2 through 6, only translate words between
 $	left "(" and right ").
-$
+$ 
 7 %s: 孚 script 埔恻盆 root 仝如
 8 祁挝: 糯情趴戆
 9 祁挝: 腈友摹远趴戆