Allow warnings in modules/camera/3_4.

* This directory still has many warnings to fix.

Bug: 66996870
Test: normal build
Change-Id: I0e05b78eca9d58dc9081bb3810f5ccabadfc21a7
Exempt-From-Owner-Approval: quick fix for broken build
diff --git a/modules/camera/3_4/Android.mk b/modules/camera/3_4/Android.mk
index d4201ba..05ddf5a 100644
--- a/modules/camera/3_4/Android.mk
+++ b/modules/camera/3_4/Android.mk
@@ -32,7 +32,7 @@
 
 v4l2_static_libs :=
 
-v4l2_cflags := -fno-short-enums -Wall -Wextra -fvisibility=hidden
+v4l2_cflags := -fno-short-enums -Wall -Wno-error -Wextra -fvisibility=hidden
 
 v4l2_c_includes := $(call include-path-for, camera)