touch_noise_filter: Update libchrome version to 307740

Also added C++11 support now required by libchrome

BUG=None
TEST=FEATURES=test emerge-link touch_noise_filter
CQ-DEPEND=CL:234450

Change-Id: I26a18ae0db771dbde1ae73c4b2208df73bd26914
Reviewed-on: https://chromium-review.googlesource.com/234824
Tested-by: Alex Vakulenko <avakulenko@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Alex Vakulenko <avakulenko@chromium.org>
diff --git a/Makefile b/Makefile
index 6d011ef..0bacc41 100644
--- a/Makefile
+++ b/Makefile
@@ -29,6 +29,7 @@
 	-fno-exceptions \
 	-fno-strict-aliasing \
 	-fPIC \
+	-std=gnu++11 \
 	-Wall \
 	-Wclobbered \
 	-Wempty-body \
@@ -44,7 +45,7 @@
 	-I..
 
 PKG_CONFIG ?= pkg-config
-BASE_VER ?= 242728
+BASE_VER ?= 307740
 PC_DEPS += libchrome-$(BASE_VER)
 PC_CFLAGS := $(shell $(PKG_CONFIG) --cflags $(PC_DEPS))
 PC_LIBS := $(shell $(PKG_CONFIG) --libs $(PC_DEPS))