package/alsa-lib: don't override dependencies

Don't override ALSA_LIB_DEPENDENCIES in a conditional

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/alsa-lib/alsa-lib.mk

@@ -64,13 +64,13 @@ ALSA_LIB_CONF_OPTS += \
 	--with-pythonlibs=-lpython$(PYTHON_VERSION_MAJOR) \
 	--with-pythonincludes=$(STAGING_DIR)/usr/include/python$(PYTHON_VERSION_MAJOR)
 ALSA_LIB_CFLAGS += -I$(STAGING_DIR)/usr/include/python$(PYTHON_VERSION_MAJOR)
-ALSA_LIB_DEPENDENCIES = python
+ALSA_LIB_DEPENDENCIES += python
 else
 ALSA_LIB_CONF_OPTS += \
 	--with-pythonlibs=-lpython$(PYTHON3_VERSION_MAJOR) \
 	--with-pythonincludes=$(STAGING_DIR)/usr/include/python$(PYTHON3_VERSION_MAJOR)
 ALSA_LIB_CFLAGS += -I$(STAGING_DIR)/usr/include/python$(PYTHON3_VERSION_MAJOR)
-ALSA_LIB_DEPENDENCIES = python3
+ALSA_LIB_DEPENDENCIES += python3
 endif
 else
 ALSA_LIB_CONF_OPTS += --disable-python