[Android]: Update Makefile.android to use platform-14 as minimum.

The version of the NDK in Chromium only has platform/android-14 and above
(since Chrome only supports API 14 and above).  To make it easier for
developers to use the Chromium NDK to build V8, this CL updates the default
platform version to 14.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/267873002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21159 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Makefile.android

@@ -47,7 +47,7 @@ else
 endif
 
 ifeq ($(ARCH), android_arm)
-  DEFINES  = target_arch=arm v8_target_arch=arm android_target_arch=arm android_target_platform=9
+  DEFINES  = target_arch=arm v8_target_arch=arm android_target_arch=arm android_target_platform=14
   DEFINES += arm_neon=0 arm_version=7
   TOOLCHAIN_ARCH = arm-linux-androideabi
   TOOLCHAIN_PREFIX = $(TOOLCHAIN_ARCH)
@@ -60,7 +60,7 @@ else
     TOOLCHAIN_VER = 4.8
   else
     ifeq ($(ARCH), android_mipsel)
-      DEFINES  = target_arch=mipsel v8_target_arch=mipsel android_target_platform=9
+      DEFINES  = target_arch=mipsel v8_target_arch=mipsel android_target_platform=14
       DEFINES += android_target_arch=mips mips_arch_variant=mips32r2
       TOOLCHAIN_ARCH = mipsel-linux-android
       TOOLCHAIN_PREFIX = $(TOOLCHAIN_ARCH)
@@ -68,7 +68,7 @@ else
 
     else
       ifeq ($(ARCH), android_ia32)
-        DEFINES = target_arch=ia32 v8_target_arch=ia32 android_target_arch=x86 android_target_platform=9
+        DEFINES = target_arch=ia32 v8_target_arch=ia32 android_target_arch=x86 android_target_platform=14
         TOOLCHAIN_ARCH = x86
         TOOLCHAIN_PREFIX = i686-linux-android
         TOOLCHAIN_VER = 4.6