audioflinger: Fix deletion of input buffer in EffectChain

mInBuffer, when it is owned by EffectChain, comes from
AudioFlinger::PlaybackThread::addEffectChain_l where it is
allocated using "new[]", and thus needs to be deleted
using "delete[]".

Change-Id: Ib16bab59f9e00627f8ef52f7232ebdd74a6c9a74
Test: make
diff --git a/services/audioflinger/Effects.cpp b/services/audioflinger/Effects.cpp
index ff96b86..6c937a5 100644
--- a/services/audioflinger/Effects.cpp
+++ b/services/audioflinger/Effects.cpp
@@ -1496,7 +1496,7 @@
 AudioFlinger::EffectChain::~EffectChain()
 {
     if (mOwnInBuffer) {
-        delete mInBuffer;
+        delete[] mInBuffer;
     }
 }