[Buildroot] [git commit branch/2019.08.x] package/sdl_mixer: disable parallel build

[Peter Korsgaard]

commit: https://git.buildroot.net/buildroot/commit/?id=43a79b964322397563cde746a1c26d69b7bb5e99
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2019.08.x

Build sometimes fails on:
Fatal error: can't create build/load_aiff.o: No such file or directory

Fixes:
 - http://autobuild.buildroot.org/results/c800ef60d8af0cd76f2f1de9aff573120ebd8ada

Signed-off-by: Fabrice Fontaine <fontaine.fabrice at gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
(cherry picked from commit fcc22749e80cff1a021fad8defaac044a208d137)
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
 package/sdl_mixer/sdl_mixer.mk | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/package/sdl_mixer/sdl_mixer.mk b/package/sdl_mixer/sdl_mixer.mk
index 1c6912accf..9183a4aa8c 100644
--- a/package/sdl_mixer/sdl_mixer.mk
+++ b/package/sdl_mixer/sdl_mixer.mk
@@ -10,6 +10,9 @@ SDL_MIXER_SITE = http://www.libsdl.org/projects/SDL_mixer/release
 SDL_MIXER_LICENSE = Zlib
 SDL_MIXER_LICENSE_FILES = COPYING
 
+# Package does not build in parallel due to improper make rules
+SDL_MIXER_MAKE = $(MAKE1)
+
 SDL_MIXER_INSTALL_STAGING = YES
 SDL_MIXER_DEPENDENCIES = sdl