Bug 1372057 - Limit pulse-rust to nightly builds. r=kinetik

MozReview-Commit-ID: Ev4GSuEN5Xa

--HG--
extra : rebase_source : 0e3910ffa437963810d5f42d5e2f3486e72801ef

media/libcubeb/prefer-pulse-rust.patch

@@ -6,7 +6,7 @@ index 1db59240e335..241f3cfed041 100644
       * to override all other choices
       */
      init_oneshot,
-+#if defined(USE_PULSE_RUST)
++#if defined(NIGHTLY_BUILD) && defined(USE_PULSE_RUST)
 +    pulse_rust_init,
 +#endif
  #if defined(USE_PULSE)

media/libcubeb/src/cubeb.c

@@ -166,7 +166,7 @@ cubeb_init(cubeb ** context, char const * context_name, char const * backend_nam
      * to override all other choices
      */
     init_oneshot,
-#if defined(USE_PULSE_RUST)
+#if defined(NIGHTLY_BUILD) && defined(USE_PULSE_RUST)
     pulse_rust_init,
 #endif
 #if defined(USE_PULSE)