Move AndroidConfig.h from system/core to the build project.

So unbundled branches don't need to include the system/core project.

Change-Id: Ic4ef62ee6df069b9b2dd123aed95a3e7fcdfc146
diff --git a/core/combo/HOST_linux-x86.mk b/core/combo/HOST_linux-x86.mk
index cb5f004..28c8f8c 100644
--- a/core/combo/HOST_linux-x86.mk
+++ b/core/combo/HOST_linux-x86.mk
@@ -57,11 +57,8 @@
 HOST_GLOBAL_LDFLAGS += -static
 endif # BUILD_HOST_static
 
-HOST_GLOBAL_CFLAGS += -fPIC
-ifeq (,$(TARGET_BUILD_APPS))
-HOST_GLOBAL_CFLAGS += \
-	-include $(call select-android-config-h,linux-x86)
-endif
+HOST_GLOBAL_CFLAGS += -fPIC \
+    -include $(call select-android-config-h,linux-x86)
 
 # Disable new longjmp in glibc 2.11 and later. See bug 2967937.
 HOST_GLOBAL_CFLAGS += -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0