running tests for shared extensions, compiled out of php src tree

Hello,

I think we should add some stuffs to be able to run the tests using a
shared extension, outside the php source tree.

Some changes are required in phpize and run-tests.php as well as in the
Makefile.

some quick thoughts:

• Add the run-tests.php to the top level sources tree
  or

• Install run-tests.php on make install

• Test should be called using $(SAPI_CLI_PATH)
  $(top_src_dir)/run-tests.php $(top_src_dir)/tests/
  or $(libdir)/tests/run-tests.php

• A way to load the Ext, in the ini section?
  or let the authors load it again in FILE using dl?

I would like to get some feedbacks and/or comments. And if it is
possible or not to make these changes. That should help a lot QA
processes for extensions and pecl extensions (ie running them from pear
install foobar).

pierre