Don't compile libaapt with the build number

Only do that for the aapt binary itself. This will allow libaapt to be
converted to Soong.

Also remove a few lines that weren't doing anything: aaptCppflags was
never set, LOCAL_C_INCLUDES := $(LOCAL_PATH) is implied.

Test: m aapt
Test: aapt version
Change-Id: Ia3bcece14921417e1bfd3406630961c013bd497c
diff --git a/tools/aapt/Android.mk b/tools/aapt/Android.mk
index 0a515db..e74a3df 100644
--- a/tools/aapt/Android.mk
+++ b/tools/aapt/Android.mk
@@ -65,8 +65,7 @@
     libbase \
     libz
 
-aaptCFlags := -DAAPT_VERSION=\"$(BUILD_NUMBER_FROM_FILE)\"
-aaptCFlags += -Wall -Werror
+aaptCFlags := -Wall -Werror
 
 # ==========================================================
 # Build the host static library: libaapt
@@ -76,7 +75,6 @@
 LOCAL_MODULE := libaapt
 LOCAL_MODULE_HOST_OS := darwin linux windows
 LOCAL_CFLAGS := -Wno-format-y2k -DSTATIC_ANDROIDFW_FOR_TOOLS $(aaptCFlags)
-LOCAL_CPPFLAGS := $(aaptCppFlags)
 LOCAL_CFLAGS_darwin := -D_DARWIN_UNLIMITED_STREAMS
 LOCAL_SRC_FILES := $(aaptSources)
 LOCAL_STATIC_LIBRARIES := $(aaptHostStaticLibs)
@@ -90,8 +88,7 @@
 
 LOCAL_MODULE := aapt
 LOCAL_MODULE_HOST_OS := darwin linux windows
-LOCAL_CFLAGS := $(aaptCFlags)
-LOCAL_CPPFLAGS := $(aaptCppFlags)
+LOCAL_CFLAGS := -DAAPT_VERSION=\"$(BUILD_NUMBER_FROM_FILE)\" $(aaptCFlags)
 LOCAL_SRC_FILES := $(aaptMain)
 LOCAL_STATIC_LIBRARIES := libaapt $(aaptHostStaticLibs)
 
@@ -105,9 +102,7 @@
 
 LOCAL_MODULE := libaapt_tests
 LOCAL_CFLAGS := $(aaptCFlags)
-LOCAL_CPPFLAGS := $(aaptCppFlags)
 LOCAL_SRC_FILES := $(aaptTests)
-LOCAL_C_INCLUDES := $(LOCAL_PATH)
 LOCAL_STATIC_LIBRARIES := libaapt $(aaptHostStaticLibs)
 
 include $(BUILD_HOST_NATIVE_TEST)