meta-google: linux: Add pstore + dmesg time config

This is allows us to store larger logs and see timestamps in the dmesg
output.

Change-Id: I3fe95b49579780917115f4a57afc35f9b594a994
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-google/recipes-kernel/linux/files/gbmc.cfg b/meta-google/recipes-kernel/linux/files/gbmc.cfg
index 056ee91..566c5a8 100644
--- a/meta-google/recipes-kernel/linux/files/gbmc.cfg
+++ b/meta-google/recipes-kernel/linux/files/gbmc.cfg
@@ -53,3 +53,9 @@
 CONFIG_INPUT_MOUSE=n
 CONFIG_KEYBOARD_ATKBD=n
 CONFIG_SERIO_LIBPS2=n
+
+# Features useful if a machine enables pstore for dumps
+CONFIG_PSTORE_DEFLATE_COMPRESS=n
+CONFIG_PSTORE_ZSTD_COMPRESS=y
+CONFIG_PSTORE_ZSTD_COMPRESS_DEFAULT=y
+CONFIG_PRINTK_TIME=y