Update toolchain for Android mipsel, ia32, x87.

Makefile.android

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 46 matching lines @@
     DEFINES  = target_arch=arm64 v8_target_arch=arm64 android_target_arch=arm64 android_target_platform=L
     TOOLCHAIN_ARCH = aarch64-linux-android
     TOOLCHAIN_PREFIX = $(TOOLCHAIN_ARCH)
     TOOLCHAIN_VER = 4.9
   else
     ifeq ($(ARCH), android_mipsel)
       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)
-      TOOLCHAIN_VER = 4.6
+      TOOLCHAIN_VER = 4.8
 
     else
       ifeq ($(ARCH), android_ia32)
         DEFINES = target_arch=ia32 v8_target_arch=ia32 android_target_arch=x86 android_target_platform=14
         TOOLCHAIN_ARCH = x86
         TOOLCHAIN_PREFIX = i686-linux-android
-        TOOLCHAIN_VER = 4.6
+        TOOLCHAIN_VER = 4.8
       else
         ifeq ($(ARCH), android_x87)
           DEFINES = target_arch=x87 v8_target_arch=x87 android_target_arch=x86 android_target_platform=14
           TOOLCHAIN_ARCH = x86
           TOOLCHAIN_PREFIX = i686-linux-android
-          TOOLCHAIN_VER = 4.6
+          TOOLCHAIN_VER = 4.8
         else
           $(error Target architecture "${ARCH}" is not supported)
         endif
       endif
     endif
   endif
 endif
 
 TOOLCHAIN_PATH = \
     ${ANDROID_NDK_ROOT}/toolchains/${TOOLCHAIN_ARCH}-${TOOLCHAIN_VER}/prebuilt
@@ skipping 26 matching lines @@
 ANDROID_MAKEFILES = $(addprefix $(OUTDIR)/Makefile.,$(ANDROID_BUILDS))
 $(ANDROID_MAKEFILES):
         GYP_GENERATORS=make-android \
         GYP_DEFINES="${DEFINES}" \
         CC="${ANDROID_TOOLCHAIN}/bin/${TOOLCHAIN_PREFIX}-gcc" \
         CXX="${ANDROID_TOOLCHAIN}/bin/${TOOLCHAIN_PREFIX}-g++" \
         PYTHONPATH="$(shell pwd)/tools/generate_shim_headers:$(shell pwd)/build:$(PYTHONPATH)" \
         build/gyp/gyp --generator-output="${OUTDIR}" build/all.gyp \
                       -Ibuild/standalone.gypi --depth=. -Ibuild/android.gypi \
                       -S$(suffix $(basename $@))$(suffix $@) ${GYPFLAGS}