8234541: C1 emits an empty message when it inlines successfully
Summary: Use "inline" as the message when successfull
Reviewed-by: thartmann, mdoerr
Contributed-by: navy.xliu@gmail.com
# testcases
key0=abcd\
\
key1=value1
key2 \= abcde
key3
#key4=abcde
key5 ===Arial,ANSI_CHARSET
key6= WingDings,SYMBOL_CHARSET \\\
abc
key7 Symbol,SYMBOL_CHARSET \
keyabcdef
key8notassign abcdef
key9\ Term=ABCDE
\\:key10=bar
\\\\:key11=bar2
\\\:key12=bar2
key13dialog.3=
key14_asdfa
key15 \ abcdef
key16\ b= \ abcdef
key17=\
#bar\
baz