kernel 4.19-ht: Explicitly build kernel with -gdwarf-4.

Build the 4.19-ht kernel explicitly with DWARF v4 (in preparation for
the DWARF v5 migration).

BUG=chromium:1129287
TEST=None

Signed-off-by: Caroline Tice <cmtice@google.com>
Change-Id: I4c7c3060cc18830ed1702f144b5145a51a3fdcfe
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/2421063
Tested-by: Caroline Tice <cmtice@chromium.org>
Auto-Submit: Caroline Tice <cmtice@chromium.org>
Commit-Queue: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
diff --git a/chromeos/config/base.config b/chromeos/config/base.config
index 39623c2..3d451a9 100644
--- a/chromeos/config/base.config
+++ b/chromeos/config/base.config
@@ -66,6 +66,7 @@
 CONFIG_DEBUG_CREDENTIALS=y
 CONFIG_DEBUG_DEVRES=y
 CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF4=y
 # CONFIG_DEBUG_PREEMPT is not set
 CONFIG_DEBUG_SPINLOCK=y
 CONFIG_DEFAULT_HOSTNAME="localhost"