android: Remove/filter header files from LOCAL_SRC_FILES

This avoids huge warnings when building the native code.

src/starter/Android.mk

@@ -2,13 +2,15 @@ LOCAL_PATH := $(call my-dir)
 include $(CLEAR_VARS)
 
 # copy-n-paste from Makefile.am (update for LEX/YACC)
-LOCAL_SRC_FILES := \
+starter_SOURCES := \
 parser.c lexer.c ipsec-parser.h netkey.c args.h netkey.h \
 starterstroke.c confread.c \
 starterstroke.h confread.h args.c \
 keywords.c files.h keywords.h cmp.c starter.c cmp.h invokecharon.c \
 invokecharon.h klips.c klips.h
 
+LOCAL_SRC_FILES := $(filter %.c,$(starter_SOURCES))
+
 # build starter ----------------------------------------------------------------
 
 LOCAL_C_INCLUDES += \