msacm32/tests: Add some acmStreamPrepareHeader and acmStreamConvert tests

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
https://testbot.winehq.org/JobDetails.pl?Key=18454

Your paranoid android.


=== wvistau64 (64 bit msacm) ===
msacm.c:621: Test failed: prepare failed: 0xb
msacm.c:622: Test failed: header wasn't prepared: 0x0
msacm.c:628: Test failed: convert failed: 0x202
msacm.c:629: Test failed: conversion was not done: 0x0
msacm.c:630: Test failed: expected 512, got 12345
msacm.c:632: Test failed: expected 1010, got 12345
msacm.c:635: Test failed: unprepare failed: 0x202
msacm.c:636: Test failed: header wasn't unprepared: 0x0

=== w2008s64 (64 bit msacm) ===
msacm.c:621: Test failed: prepare failed: 0xb
msacm.c:622: Test failed: header wasn't prepared: 0x0
msacm.c:628: Test failed: convert failed: 0x202
msacm.c:629: Test failed: conversion was not done: 0x0
msacm.c:630: Test failed: expected 512, got 12345
msacm.c:632: Test failed: expected 1010, got 12345
msacm.c:635: Test failed: unprepare failed: 0x202
msacm.c:636: Test failed: header wasn't unprepared: 0x0

=== w7pro64 (64 bit msacm) ===
msacm.c:621: Test failed: prepare failed: 0xb
msacm.c:622: Test failed: header wasn't prepared: 0x0
msacm.c:628: Test failed: convert failed: 0x202
msacm.c:629: Test failed: conversion was not done: 0x0
msacm.c:630: Test failed: expected 512, got 12345
msacm.c:632: Test failed: expected 1010, got 12345
msacm.c:635: Test failed: unprepare failed: 0x202
msacm.c:636: Test failed: header wasn't unprepared: 0x0

=== w864 (64 bit msacm) ===
msacm.c:621: Test failed: prepare failed: 0xb
msacm.c:622: Test failed: header wasn't prepared: 0x0
msacm.c:628: Test failed: convert failed: 0x202
msacm.c:629: Test failed: conversion was not done: 0x0
msacm.c:630: Test failed: expected 512, got 12345
msacm.c:632: Test failed: expected 1010, got 12345
msacm.c:635: Test failed: unprepare failed: 0x202
msacm.c:636: Test failed: header wasn't unprepared: 0x0

=== w1064 (64 bit msacm) ===
msacm.c:621: Test failed: prepare failed: 0xb
msacm.c:622: Test failed: header wasn't prepared: 0x0
msacm.c:628: Test failed: convert failed: 0x202
msacm.c:629: Test failed: conversion was not done: 0x0
msacm.c:630: Test failed: expected 512, got 12345
msacm.c:632: Test failed: expected 1010, got 12345
msacm.c:635: Test failed: unprepare failed: 0x202
msacm.c:636: Test failed: header wasn't unprepared: 0x0