Remove Check suite; hand-write the two tests that use it. While we're

Remove Check suite; hand-write the two tests that use it.  While we're
here, remove the bitrotted tests memexpr_test and bytecode_test.

* check: Deleted.
* Makefile.am: Unhook Check suite from build.
* configure.ac: Remove tests for things needed only for Check suite.

* memexpr_test.c: Delete.
* bytecode_test.c: Delete.
* libyasm/tests/Makefile.inc: Delete commented-out references to above.

* bitvect_test.c: Rewrite to not use Check suite.
* floatnum_test.c: Likewise.
* libyasm/tests/Makefile.inc: Don't reference Check suite.

svn path=/trunk/yasm/; revision=1178