b=1033140 make speex_resampler declarations consistent with OUTSIDE_SPEEX implementation r=padenot

Instead of defining OUTSIDE_SPEEX and RANDOM_PREFIX everywhere
speex_resampler.h is included, it is easier to patch the header.

Symbol names in gkmedias symbols.def are updated now that RANDOM_PREFIX is
taking effect, and unused symbols are no longer exported.

--HG--
extra : transplant_source : sx%C9%ED%EB%E7%D8P%09%18%87%D4Oj%85%D5%25%C8%A5%01
b=1020411 correct control message order with RunAfterPendingUpdates() at shutdown r=roc

--HG--
extra : transplant_source : %AE%05%92%2C%60%9FL%D0%13O%EE%7D%09ZV%87%06%E9%B6%D8