core-image-sato-sdk-ptest: use 2G of RAM

Particularly, 1G wasn't enough for lttng-tools ptests as
half of that went to /tmp, and lttng-tools needs more.

(From OE-Core rev: abc308a38c6e37afcaf507858a6578c10438c5d8)

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-sato/images/core-image-sato-sdk-ptest.bb

@@ -18,4 +18,5 @@ IMAGE_OVERHEAD_FACTOR = "1.0"
 IMAGE_ROOTFS_EXTRA_SPACE = "1124288"
 
 # ptests need more memory than standard to avoid the OOM killer
-QB_MEM = "-m 1024"
+# also lttng-tools needs /tmp that has at least 1G
+QB_MEM = "-m 2048"