valgrind: skip flaky ptest fb_test_amd64

Recently, the none/tests/amd64/fb_test_amd64 test had been flaky and
causing failures on the auto-builder. Until we can get to the root cause
of the issue, we are going to skip the test to reduce the noise from the
ptests.

(From OE-Core rev: a365cd7a358db96791033e6dc6e45d2e816d3e4c)

Signed-off-by: Tony Tascioglu <tony.tascioglu@windriver.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/valgrind/valgrind/remove-for-all

@@ -0,0 +1 @@
+none/tests/amd64/fb_test_amd64