[Core] Improve iOS compilation workflow

src/miniaudio/miniaudio.cpp

@@ -4,4 +4,6 @@
 #define MA_NO_ENCODING
 #define MINIAUDIO_IMPLEMENTATION
 
-#include "miniaudio.h"
+#ifndef PANDA3DS_IOS
+#include "miniaudio.h"
+#endif

src/miniaudio/miniaudio.m

@@ -0,0 +1,8 @@
+// We do not need the ability to be able to encode or decode audio files for the time being
+// So we disable said functionality to make the executable smaller.
+#define MA_NO_DECODING
+#define MA_NO_ENCODING
+#define MINIAUDIO_IMPLEMENTATION
+
+// On iOS we have to compile miniaudio as Obj-C
+#include "miniaudio.h"