[source] kernel: add missing config symbol

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/?p=source.git;a=commitdiff;h=0a9fdeca6edb2fe7e0af14f94a6a59a0334c9102

commit 0a9fdeca6edb2fe7e0af14f94a6a59a0334c9102
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Tue Aug 2 08:16:44 2016 +0200

    kernel: add missing config symbol
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 target/linux/generic/config-4.4 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/linux/generic/config-4.4 b/target/linux/generic/config-4.4
index 335a433..48a11cf 100644
--- a/target/linux/generic/config-4.4
+++ b/target/linux/generic/config-4.4
@@ -3768,6 +3768,7 @@ CONFIG_SND_PCI=y
 # CONFIG_SND_PCM_OSS is not set
 CONFIG_SND_PCM_OSS_PLUGINS=y
 # CONFIG_SND_PCM_TIMER is not set
+# CONFIG_SND_PCM_XRUN_DEBUG is not set
 # CONFIG_SND_PCXHR is not set
 # CONFIG_SND_PDAUDIOCF is not set
 # CONFIG_SND_PORTMAN2X4 is not set