gettext 0.19.3

Update to latest stable release, change format of make command.

>*Noteworthy changes in 0.19.3:*
>
>* Bug fixes:
>  - Fix xgettext mishandling of octal character escapes in C.
>  - Fix autopoint infinite recursion with certain configure.ac.
>
>* The po/Makevars file has a new field MSGINIT_OPTIONS, that can be used to adjust msginit's operation. This is particularly useful for controlling line wrapping behavior together with MSGMERGE_OPTIONS and XGETTEXT_OPTIONS.
>
>* Portability:
>  - Building on Solaris 10 and 11 with Solaris Studio compiler is now fixed.