Switch toolchain from gcc-4.4.0 to gcc-4.4.3

gcc-4.4.3 toolchain is based on fsf GCC-4.4.3 with numerous patches.
It reduces 3.65% code size than the prebuilt gcc-4.4.0 toolchain,
and improves 3.4% performance on Android benchmarks.

The toolchain uses gold as default linker. With gold, the toolchain
further reduces 1MB system image.

Change-Id: I55eb4df185f2932e71498fcc28428e4d1b175393
diff --git a/envsetup.sh b/envsetup.sh
index f4dfc55..c899c5c 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -103,7 +103,7 @@
     # and in with the new
     CODE_REVIEWS=
     prebuiltdir=$(getprebuilt)
-    export ANDROID_EABI_TOOLCHAIN=$prebuiltdir/toolchain/arm-eabi-4.4.0/bin
+    export ANDROID_EABI_TOOLCHAIN=$prebuiltdir/toolchain/arm-eabi-4.4.3/bin
     export ANDROID_TOOLCHAIN=$ANDROID_EABI_TOOLCHAIN
     export ANDROID_QTOOLS=$T/development/emulator/qtools
     export ANDROID_BUILD_PATHS=:$(get_build_var ANDROID_BUILD_PATHS):$ANDROID_QTOOLS:$ANDROID_TOOLCHAIN:$ANDROID_EABI_TOOLCHAIN$CODE_REVIEWS