Move GNSS_CFLAGS to build/ to be fully included

GNSS_CFLAGS included in pla module cannot be included by all the
modules. Define it in build/target_specific_features.mk to make it
included by the whole project.

Change-Id: Ib13c43a65ecd14a7a97050dd80b4dce6aa8ad339
CRs-fixed: 2168176

Android.mk

@@ -1,5 +1,6 @@
 ifneq ($(BOARD_VENDOR_QCOM_GPS_LOC_API_HARDWARE),)
 LOCAL_PATH := $(call my-dir)
+include $(LOCAL_PATH)/build/target_specific_features.mk
 
 include $(call all-makefiles-under,$(LOCAL_PATH))
 endif

build/target_specific_features.mk

@@ -0,0 +1,17 @@
+GNSS_CFLAGS := \
+    -Werror \
+    -Wno-error=unused-parameter \
+    -Wno-error=format \
+    -Wno-error=macro-redefined \
+    -Wno-error=reorder \
+    -Wno-error=missing-braces \
+    -Wno-error=self-assign \
+    -Wno-error=enum-conversion \
+    -Wno-error=logical-op-parentheses \
+    -Wno-error=null-arithmetic \
+    -Wno-error=null-conversion \
+    -Wno-error=parentheses-equality \
+    -Wno-error=undefined-bool-conversion \
+    -Wno-error=tautological-compare \
+    -Wno-error=switch \
+    -Wno-error=date-time