Fix the bogus translation of matchdeclare when used with local

Fix the bogus translation of matchdeclare when used with local

This is an ancient bug that was present in Macsyma.

This affected matchdeclare forms translated with something other
than translate_file (e.g., translate or compfile).

META-OUTPUT needs to always push onto META-PROP-L when translating.
Otherwise, when local is used for the pattern variable, the
MATCHDECLARE property will not be on the pattern variable:

(%i1) foo():=(local(x),matchdeclare(x,true),let(a*x,x),letsimp(a*q))$

(%i2) foo();
(%o2) q

(%i3) translate(foo)$

(%i4) foo();
(%o4) a*q

No problems with the test suite or share test suite.  A new test
has been added to rtest_translator.