Switch default gcc toolchain from 4.4.3 to 4.6.

Switch both arm-linux-androideabi toolchainand arm-eabi toolchain.

Change-Id: I7b2771fe684853ab37e3b5b7cfe4146f9f901e02
diff --git a/core/combo/TARGET_linux-arm.mk b/core/combo/TARGET_linux-arm.mk
index 711041d..ca12ba2 100644
--- a/core/combo/TARGET_linux-arm.mk
+++ b/core/combo/TARGET_linux-arm.mk
@@ -43,7 +43,7 @@
 
 # You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
 ifeq ($(strip $(TARGET_TOOLS_PREFIX)),)
-TARGET_TOOLCHAIN_ROOT := prebuilt/$(HOST_PREBUILT_TAG)/toolchain/arm-linux-androideabi-4.4.x
+TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-4.6
 TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/arm-linux-androideabi-
 endif
 
diff --git a/core/dumpvar.mk b/core/dumpvar.mk
index 87f7086..0f7dd8f 100644
--- a/core/dumpvar.mk
+++ b/core/dumpvar.mk
@@ -10,18 +10,19 @@
 endif
 
 # Add the ARM toolchain bin dir if it actually exists
-ifneq ($(wildcard $(PWD)/prebuilt/$(HOST_PREBUILT_TAG)/toolchain/arm-linux-androideabi-4.4.x/bin),)
+ifneq ($(wildcard $(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-4.6/bin),)
 	# this should be copied to HOST_OUT_EXECUTABLES instead
-	ABP:=$(ABP):$(PWD)/prebuilt/$(HOST_PREBUILT_TAG)/toolchain/arm-linux-androideabi-4.4.x/bin
+	ABP:=$(ABP):$(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-4.6/bin
 endif
 
 # Add the x86 toolchain bin dir if it actually exists
 ifneq ($(wildcard $(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/x86/i686-android-linux-4.4.3/bin),)
 	# this should be copied to HOST_OUT_EXECUTABLES instead
-	ABP:=$(ABP):$(PWD)/prebuilts/gcc//$(HOST_PREBUILT_TAG)/x86/i686-android-linux-4.4.3/bin
+	ABP:=$(ABP):$(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/x86/i686-android-linux-4.4.3/bin
 endif
 ANDROID_BUILD_PATHS := $(ABP)
 ANDROID_PREBUILTS := prebuilt/$(HOST_PREBUILT_TAG)
+ANDROID_GCC_PREBUILTS := prebuilts/gcc/$(HOST_PREBUILT_TAG)
 
 # The "dumpvar" stuff lets you say something like
 #
diff --git a/envsetup.sh b/envsetup.sh
index b7ca7d2..7711e0d 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -112,18 +112,19 @@
     # and in with the new
     CODE_REVIEWS=
     prebuiltdir=$(getprebuilt)
+    gccprebuiltdir=$(get_abs_build_var ANDROID_GCC_PREBUILTS)
 
     # The gcc toolchain does not exists for windows/cygwin. In this case, do not reference it.
     export ANDROID_EABI_TOOLCHAIN=
-    toolchaindir=toolchain/arm-linux-androideabi-4.4.x/bin
-    if [ -d "$prebuiltdir/$toolchaindir" ]; then
-        export ANDROID_EABI_TOOLCHAIN=$prebuiltdir/$toolchaindir
+    toolchaindir=arm/arm-linux-androideabi-4.6/bin
+    if [ -d "$gccprebuiltdir/$toolchaindir" ]; then
+        export ANDROID_EABI_TOOLCHAIN=$gccprebuiltdir/$toolchaindir
     fi
 
     export ARM_EABI_TOOLCHAIN=
-    toolchaindir=toolchain/arm-eabi-4.4.3/bin
-    if [ -d "$prebuiltdir/$toolchaindir" ]; then
-        export ARM_EABI_TOOLCHAIN=$prebuiltdir/$toolchaindir
+    toolchaindir=arm/arm-eabi-4.6/bin
+    if [ -d "$gccprebuiltdir/$toolchaindir" ]; then
+        export ARM_EABI_TOOLCHAIN=$gccprebuiltdir/$toolchaindir
     fi
 
     export ANDROID_TOOLCHAIN=$ANDROID_EABI_TOOLCHAIN
diff --git a/tools/adbs b/tools/adbs
index 1a400f7..598af85 100755
--- a/tools/adbs
+++ b/tools/adbs
@@ -140,13 +140,13 @@
     uname = "darwin-x86"
   elif uname == "Linux":
     uname = "linux-x86"
-  prefix = "./prebuilt/" + uname + "/toolchain/arm-linux-androideabi-4.4.x/bin/"
+  prefix = "./prebuilts/gcc/" + uname + "/arm/arm-linux-androideabi-4.6/bin/"
   addr2line_cmd = prefix + "arm-linux-androideabi-addr2line"
 
   if (not os.path.exists(addr2line_cmd)):
     try:
-      prefix = os.environ['ANDROID_BUILD_TOP'] + "/prebuilt/" + uname + \
-               "/toolchain/arm-linux-androideabi-4.4.x/bin/"
+      prefix = os.environ['ANDROID_BUILD_TOP'] + "/prebuilts/gcc/" + \
+               uname + "/arm/arm-linux-androideabi-4.6/bin/"
     except:
       prefix = "";