crosssdk/cross-canadian: Set LIBCOVERRIDE correctly

(From OE-Core rev: 94bece16c23c9ec8850fd497aea37e6a265da30a)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/cross-canadian.bbclass

@@ -8,6 +8,8 @@
 # SDK packages are built either explicitly by the user,
 # or indirectly via dependency.  No need to be in 'world'.
 EXCLUDE_FROM_WORLD = "1"
+NATIVESDKLIBC ?= "libc-glibc"
+LIBCOVERRIDE = ":${NATIVESDKLIBC}"
 CLASSOVERRIDE = "class-cross-canadian"
 STAGING_BINDIR_TOOLCHAIN = "${STAGING_DIR_NATIVE}${bindir_native}/${SDK_ARCH}${SDK_VENDOR}-${SDK_OS}:${STAGING_DIR_NATIVE}${bindir_native}/${TARGET_ARCH}${TARGET_VENDOR}-${TARGET_OS}"
 

meta/classes/crosssdk.bbclass

@@ -1,6 +1,8 @@
 inherit cross
 
 CLASSOVERRIDE = "class-crosssdk"
+NATIVESDKLIBC ?= "libc-glibc"
+LIBCOVERRIDE = ":${NATIVESDKLIBC}"
 MACHINEOVERRIDES = ""
 PACKAGE_ARCH = "${SDK_ARCH}"
 python () {