Added x86 asm and C wav writer and player examples.

Specifically:
* Added win32, elf32 and elf64 asm player and wav writers using winmm.
* Added dsound player in C.
* Separated the ALL target and the examples; introduced a new examples target.

examples/code/asm/386/asmplay.elf32.asm

@@ -0,0 +1,81 @@
+%include TRACK_INCLUDE
+
+%define SND_PCM_FORMAT_S16_LE 0x2
+%define SND_PCM_FORMAT_FLOAT 0xE
+%define SND_PCM_ACCESS_RW_INTERLEAVED 0x3
+%define SND_PCM_STREAM_PLAYBACK 0x0
+
+section .bss
+sound_buffer:
+	resb SU_LENGTH_IN_SAMPLES * SU_SAMPLE_SIZE * SU_CHANNEL_COUNT
+
+render_thread:
+	resd 1
+
+pcm_handle:
+	resd 1
+
+section .data
+default_device:
+	db "default", 0
+
+section .text
+symbols:
+	extern pthread_create
+	extern sleep
+	extern snd_pcm_open
+	extern snd_pcm_set_params
+	extern snd_pcm_writei
+
+	global main
+main:
+	; elf32 uses the cdecl calling convention. This is more readable imo ;)
+
+	; Prologue
+	push	ebp
+	mov	 ebp, esp
+	sub	 esp, 0x10
+
+	; Unix does not have gm.dls, no need to ifdef and setup here.
+
+	; We render in the background while playing already.
+	push sound_buffer
+	lea eax, su_render_song
+	push eax
+	push 0
+	push render_thread
+	call pthread_create
+
+	; We can't start playing too early or the missing samples will be audible.
+	push 0x2
+	call sleep
+
+	; Play the track.
+	push 0x0
+	push SND_PCM_STREAM_PLAYBACK
+	push default_device
+	push pcm_handle
+	call snd_pcm_open
+
+	push SU_LENGTH_IN_SAMPLES
+	push 0
+	push SU_SAMPLE_RATE
+	push SU_CHANNEL_COUNT
+	push SND_PCM_ACCESS_RW_INTERLEAVED
+%ifdef SU_SAMPLE_FLOAT
+	push SND_PCM_FORMAT_FLOAT
+%else ; SU_SAMPLE_FLOAT
+	push SND_PCM_FORMAT_S16_LE
+%endif ; SU_SAMPLE_FLOAT
+	push dword [pcm_handle]
+	call snd_pcm_set_params
+
+	push SU_LENGTH_IN_SAMPLES
+	push sound_buffer
+	push dword [pcm_handle]
+	call snd_pcm_writei
+
+exit:
+	; At least we can skip the epilogue :)
+	leave
+	ret