package/sdl_mixer: update the patches to be applied with fuzz 0

Commit 8f88a644ed7d6 ("support/scripts/apply-patches.sh: set the maximum
fuzz factor to 0") reduced the fuzz factor.

Due to this change, sdl_mixer fails to build with output:

    Applying 0002-configure__set_macro_directory.patch using patch:
    patching file configure.ac
    Hunk #1 FAILED at 2.
    1 out of 1 hunk FAILED -- saving rejects to file configure.ac.rej

This commit refreshes the package patch on the current package version.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>

package/sdl_mixer/0002-configure__set_macro_directory.patch

@@ -20,13 +20,15 @@ Fixes:
     libtool: and run autoconf again.
 
 Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
+[Dario: make the patch to be applied with fuzz factor 0]
+Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
 
 diff --git a/configure.ac b/configure.ac
 --- a/configure.ac
 +++ b/configure.ac
-@@ -1,6 +1,7 @@
- dnl Process this file with autoconf to produce a configure script.
- AC_INIT(README)
+@@ -2,6 +2,7 @@ dnl Process this file with autoconf to produce a configure script.
+ AC_INIT
+ AC_CONFIG_SRCDIR([mixer.c])
  AC_CONFIG_AUX_DIR(build-scripts)
 +AC_CONFIG_MACRO_DIR([acinclude])