x86: qemu emulator is the default build target

Change-Id: I1fc3cb491d593d3e28f90278cfc8de5d77852932
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Signed-off-by: Jun Nakajima <jun.nakajima@intel.com>
diff --git a/target/board/generic_x86/README.txt b/target/board/generic_x86/README.txt
index 585a373..938d982 100644
--- a/target/board/generic_x86/README.txt
+++ b/target/board/generic_x86/README.txt
@@ -1,29 +1,8 @@
-The generic_x86 board target provides basic services on very basic
-hardware (really for an emulation). To build with generic_x86, you will
-need an appropriate kernel for your emulation (or device).
+The "generic_x86" product defines a non-hardware-specific IA target
+without a kernel or bootloader.
 
-A1. Create a new top level directory and pull the AOSP repository
-        mkdir $HOME/AOSP
-        cd $HOME/AOSP
-        repo init -u git://android.git.kernel.org/platform/manifest.git
-        repo sync
+It can be used to build the entire user-level system, and
+will work with the IA version of the emulator,
 
-A2. Copy in the kernel
-        cd $HOME/AOSP
-        cp ~/bzImage.your_device $HOME/AOSP/prebuilt/android-x86/kernel/kernel
-
-A3. Build
-        cd $HOME/AOSP
-        source build/envsetup.sh
-        lunch generic_x86-eng
-        make -j8
-
-The build will generate some image files whose format may or may not be correct for your
-device. You can build an installer image disk for the VirtualBox emulator using the command:
-
-A4. Build a VirtualBox installer image
-	cd $HOME/AOSP
-        source build/envsetup.sh
-        lunch generic_x86-eng
-        make -j8 installer_vdi
-
+It is not a product "base class"; no other products inherit
+from it or use it in any way.