c++: better inline expansion

c++: better inline expansion

Many 'inline' keywords were in the declarations.  They rather belong in
definitions, so move them.

* data/c++.m4 (basic_symbol, by_type): Many inlines here.
* data/lalr1.cc (yytranslate_, yy_destroy_, by_state, yypush_, yypop_): Inline
these as well.
(move): Move the definition outside the struct, where it belongs.