gfortran.h (gfc_default_*_kind): Remove prototypes, add extern variable declaration of same name.

* gfortran.h (gfc_default_*_kind): Remove prototypes, add extern
variable declaration of same name.
* arith.c, check.c, decl.c, dump_parse_tree.c, expr.c,
intrinsic.c, io.c, iresolve.c, match.c, options.c, primary.c,
resolve.c, simplify.c, symbol.c, trans-const.c, trans-io.c:
Replace all calls to gfc_default_*_kind with variable accesses.
* trans-types.c: Same as above.
(gfc_default_*_kind_1): Rename to gfc_default_*_kind, remove
static qualifier. Replace all occurences.
(gfc_default_*_kind): Remove functions.

From-SVN: r86662