Android.rules: build with "unified android headers"

Unified headers will be the only way to build applications in NDK r16,
and it also works with NDK r15.

This also bumps the minimum supported android version to 16.

llvm-svn: 316985

lldb/packages/Python/lldbsuite/test/make/Android.rules

@@ -8,7 +8,7 @@ else ifeq "$(ARCH)" "i386"
 	API_LEVEL := 17
 else
 	# lowest supported 32-bit API level
-	API_LEVEL := 9
+	API_LEVEL := 16
 endif
 
 ifeq "$(ARCH)" "arm"
@@ -18,8 +18,8 @@ ifeq "$(ARCH)" "arm"
 	ARCH_CFLAGS += -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16 -marm
 else ifeq "$(ARCH)" "aarch64"
 	SYSROOT_ARCH := arm64
-	TRIPLE := aarch64-none-linux-android
 	STL_ARCH := arm64-v8a
+	TRIPLE := aarch64-none-linux-android
 else ifeq "$(ARCH)" "i386"
 	SYSROOT_ARCH := x86
 	STL_ARCH := x86
@@ -70,7 +70,9 @@ ifeq "$(findstring clang,$(CC))" "clang"
 	ARCH_LDFLAGS += -target $(TRIPLE) -gcc-toolchain $(GCC_TOOLCHAIN)
 endif
 
-ARCH_CFLAGS += --sysroot=$(NDK_ROOT)/platforms/android-$(API_LEVEL)/arch-$(SYSROOT_ARCH)
+ARCH_CFLAGS += --sysroot=$(NDK_ROOT)/sysroot \
+	-isystem $(NDK_ROOT)/sysroot/usr/include/$(TOOL_PREFIX) \
+	-D__ANDROID_API__=$(API_LEVEL)
 ARCH_LDFLAGS += --sysroot=$(NDK_ROOT)/platforms/android-$(API_LEVEL)/arch-$(SYSROOT_ARCH) -lm
 
 ifeq (1,$(USE_LIBCPP))