project: msm8994: Turn on Werror for msm8994

This will ensure all new code to 8994 drivers compile without
warnings.

Change-Id: Id3f61ac3273384d8eae1e61fbe93193816d85f64
diff --git a/project/msm8994.mk b/project/msm8994.mk
index 26b097e..bef93ce 100644
--- a/project/msm8994.mk
+++ b/project/msm8994.mk
@@ -61,3 +61,6 @@
 ifeq ($(ENABLE_SMD_SUPPORT),1)
 DEFINES += SMD_SUPPORT=1
 endif
+
+# Turn on Werror
+CFLAGS += -Werror