As per the comment, this makes it match the Makefile (From OE-Core rev: 6fce92430e6e837d068eb8531dcd432f38adca3a) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
@@ -11,7 +11,7 @@ SRC_URI = "git://git.kernel.org/pub/scm/linux/kernel/git/clrkwllms/rt-tests.git
S = "${WORKDIR}/git"
# need to append rt-tests' default CFLAGS to ours
-CFLAGS += "-I${S}/src/include -D_GNU_SOURCE -Wall -Wno-nonnulli"
+CFLAGS += "-I${S}/src/include -D_GNU_SOURCE -Wall -Wno-nonnull"
# calling 'uname -m' is broken on crossbuilds
EXTRA_OEMAKE = "NUMA=0"