libtextstyle: Add metainformation for Windows.
* libtextstyle/lib/libtextstyle.rc: New file.
* libtextstyle/lib/Makefile.am (EXTRA_DIST): Add it.
(WOE32_LIBADD): New variable.
(libtextstyle.res.lo): New rule.
(libtextstyle_la_LIBADD, libtextstyle_la_DEPENDENCIES): Augment.
