freebsd-clang fix (see extended)

Under FreeBSD, and possiblily other clang libcxx based platforms, it seems
that you can't just do constexpr std:array ... but instead actually have to
specify more like constexpr std:array<QString,3>.

xybrid/nodes/instrument/thicc.cpp

@@ -101,13 +101,14 @@ namespace {
 
 #pragma GCC diagnostic pop
 
+    // for clang on freebsd (and possibly other non-apple llvm sources) it seems we need to specify more.
     // wave function list(s)
-    const constexpr std::array waveFunc = {
+    const constexpr std::array<double(*)(double,double,double),3> waveFunc = {
         &oscSaw,
         &oscSine,
         &oscPulse,
     };
-    const std::array waveName = {
+    const std::array<QString,3> waveName = {
         qs("saw"),
         qs("sine"),
         qs("pulse"),