Re-enable build with ICU 4.6 and 4.8
ICU versions prior to 49 don't know Conditional_Japanese_Starter and
Hebrew_Letter

Also, the change in i18npool/CustomTarget_breakiterator.mk

- -e "s#\[:LineBreak = Close_Punctuation:\]#\[& \[:LineBreak = Close_Parenthesis:\]\]#" \

with i18npool/source/breakiterator/data/line.txt

-$CL = [:LineBreak = Close_Punctuation:] ;
+$CL = [:LineBreak = Close_Parenthesis:];

did not produce equivalent results. Instead use

$CP = [:LineBreak =  Close_Parenthesis:];
$CL = [[:LineBreak =  Close_Punctuation:] $CP];

Change-Id: I14fc14319ea34f23393264560452a79bb49fc3a7