Update to libchrome-180609

BUG=chromium-os:38946
TEST=built for link without error; device works as expected

Change-Id: Ia6e0cd40fa3e43bcd5d7d83f2c775b6d523cfa3c
Reviewed-on: https://gerrit.chromium.org/gerrit/43393
Reviewed-by: Chris Masone <cmasone@chromium.org>
Commit-Queue: Andrew de los Reyes <adlr@chromium.org>
Tested-by: Andrew de los Reyes <adlr@chromium.org>
diff --git a/Makefile b/Makefile
index e729619..e4ccbc6 100644
--- a/Makefile
+++ b/Makefile
@@ -44,7 +44,7 @@
 	-I..
 
 PKG_CONFIG ?= pkg-config
-BASE_VER ?= 125070
+BASE_VER ?= 180609
 PC_DEPS += libchrome-$(BASE_VER)
 PC_CFLAGS := $(shell $(PKG_CONFIG) --cflags $(PC_DEPS))
 PC_LIBS := $(shell $(PKG_CONFIG) --libs $(PC_DEPS))