buildtools/uninative-tarball: Fix deployment overlap issues

We still have problems where deploying SDKMACHINE=i686 can cause removal of SDKMACHINE=x86_64 artefacts.

The reason is that x86_64 is a BUILD_ARCH as well as an SDK_ARCH and the manifest namespaces overlap. To fix this, set PACKAGE_ARCH and the stamp-extra-into to include SDK_OS. SDK_OS may not be entirely correct but it is what sstate.bbclass uses for nativesdk and fixing that is a separate issue.

This is confirmed to resolve artefact problems on the AB which have been delaying a new uninative release.

index da18c09..5808c95 100644
@@ -27,7 +27,7 @@ TOOLCHAIN_HOST_TASK ?= "\

     "

 MULTIMACH_TARGET_SYS = "${SDK_ARCH}-nativesdk${SDK_VENDOR}-${SDK_OS}" -PACKAGE_ARCH = "${SDK_ARCH}"
+PACKAGE_ARCH = "${SDK_ARCH}_${SDK_OS}"
 PACKAGE_ARCHS = ""
 TARGET_ARCH = "none"
 TARGET_OS = "none"
@@ -52,7 +52,7 @@ deltask package
 deltask packagedata
 deltask populate_sysroot

-do_populate_sdk[stamp-extra-info] = "${SDKMACHINE}" +do_populate_sdk[stamp-extra-info] = "${PACKAGE_ARCH}"

 REAL_MULTIMACH_TARGET_SYS = "none"

index 0dad974..e203a83 100644
@@ -17,7 +17,7 @@ TOOLCHAIN_HOST_TASK = "\

 INHIBIT_DEFAULT_DEPS = "1"

 MULTIMACH_TARGET_SYS = "${SDK_ARCH}-nativesdk${SDK_VENDOR}-${SDK_OS}" -PACKAGE_ARCH = "${SDK_ARCH}"
+PACKAGE_ARCH = "${SDK_ARCH}_${SDK_OS}"
 PACKAGE_ARCHS = ""
 TARGET_ARCH = "none"
 TARGET_OS = "none"
@@ -37,7 +37,7 @@ deltask package
 deltask packagedata
 deltask populate_sysroot

-do_populate_sdk[stamp-extra-info] = "${SDKMACHINE}" +do_populate_sdk[stamp-extra-info] = "${PACKAGE_ARCH}"

 SDK_DEPENDS += "patchelf-native"