packagegroup-core-tools-profile: skip VALGRIND for loongarch64

packagegroup-core-tools-profile: skip VALGRIND for loongarch64

Due to packagegroup-core-tools-profile run time depend
on package valgrind and recipe valgrind does not support
loongarch64, then skip VALGRIND for loongarch64

$ echo "MACHINE = 'qemuloongarch64'" >> conf/local.conf
$ bitbake world
|ERROR: Nothing RPROVIDES 'valgrind' (but oe-core/meta/recipes-core/
packagegroups/packagegroup-core-tools-profile.bb RDEPENDS on or
otherwise requires it)
|valgrind was skipped: incompatible with host loongarch64-wrs-linux
(not in COMPATIBLE_HOST)
|NOTE: Runtime target 'valgrind' is unbuildable, removing...
|Missing or unbuildable dependency chain was: ['valgrind']
|ERROR: Required build target 'meta-world-pkgdata' has no buildable providers.
|Missing or unbuildable dependency chain was: ['meta-world-pkgdata',
'packagegroup-core-tools-profile', 'valgrind']

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>