libresample is only needed by pjproject if we're building pjsua, which
we only do if TEST_FRAMEWORK is selected.  It's required by pjsua to
process audio which is needed by some testsuite tests.  Unfortunately,
pjproject relies on a newer version of libresample than the version
that ships by most distros so we need to compile the version that's
bundled with pjproject.  Since we only need it for pjsua, we DON'T want
it's symbols exposed when we actually build asterisk.

There was a problem however... TEST_FRAMEWORK is only known AFTER we've
already run ./configure on both asterisk and pjproject but pjproject's
./configure needs to test it to know whether to set up to build
libresample or not.  The previous way of figuring this out was to
always tell ./configure "yes" but not actually build the library.  This
caused an issue where building libasteriskpj was being told to include
libresample but it wasn't actually there.

The solution is to still do a default pjproject configure during an
asterisk ./configure but if makeopts or menuselect.makeopts changes
subsequently, we now reconfigure pjproject, taking into account the
current state of TEST_FRAMEWORK.  Previously, if makeopts or
menuselect.makeopts changed, only a recompile of pjproject was done.

Change-Id: I9b5d84c61384a3ae07fe30e85c49698378cc4685