Same that media-libs/cubeb does and meant for -DLAZY_LOAD_LIBS=no.

Unfortunately need to use bundled cubeb here given it modifies the
source starting with (but not likely limited to):
https://github.com/PCSX2/pcsx2/commit/9170a5abc1
--- a/3rdparty/cubeb/CMakeLists.txt
+++ b/3rdparty/cubeb/CMakeLists.txt
@@ -76,3 +76,5 @@
 
+  if(CHECK_PULSE)
   pkg_check_modules(libpulse IMPORTED_TARGET libpulse)
+  endif()
   if(libpulse_FOUND)
@@ -83,3 +85,5 @@
 
+  if(CHECK_ALSA)
   pkg_check_modules(alsa IMPORTED_TARGET alsa)
+  endif()
   if(alsa_FOUND)
@@ -90,3 +94,5 @@
 
+  if(CHECK_JACK)
   pkg_check_modules(jack IMPORTED_TARGET jack)
+  endif()
   if(jack_FOUND)
@@ -97,3 +103,5 @@
 
+  if(CHECK_SNDIO)
   check_include_files(sndio.h USE_SNDIO)
+  endif()
   if(USE_SNDIO)