cross-canadian: pkg name includes target arch

This commit fixes Bug #528.

1. Added the target arch name to the pkg name of gcc-cross-canadian,
gdb-cross-candian and bintuils-cross-candian.

2. Move the cross-canadian pkgs out of task-sdk-host into a new task
task-cross-canadian.

3. Added the RDEPENDS of task-cross-canadian into meta-toolchain.

Signed-off-by: Lianhao Lu <lianhao.lu@intel.com>

meta/recipes-devtools/binutils/binutils-cross-canadian.inc

@@ -1,4 +1,10 @@
 inherit cross-canadian
+
+
+DESCRIPTION = "A GNU collection of cross-canadian binary utilities for ${TARGET_ARCH} target"
+PN = "binutils-cross-canadian-${TARGET_ARCH}"
+BPN = "binutils"
+
 DEPENDS = "flex-native bison-native virtual/${HOST_PREFIX}gcc-crosssdk virtual/libc-nativesdk zlib-nativesdk gettext-nativesdk"
 EXTRA_OECONF = "--with-sysroot=${SDKPATH}/sysroots/${TARGET_SYS} \
 		--program-prefix=${TARGET_PREFIX}"

meta/recipes-devtools/binutils/binutils-cross-canadian_2.20.1.bb

@@ -1,3 +1,3 @@
 require binutils_${PV}.bb
 require binutils-cross-canadian.inc
-PR = "r5"
+PR = "r6"