EBBR.yaml: add comments to known ACS-IR memory map failure

The boot services memory map test has a known issue with the ACS-IR
v21.05_0.8_BETA-0. The real fix is to update the ACS-IR test code, but we
add a rule already to add some comments for that case, to help triaging.
Signed-off-by: Vincent Stehlé <vincent.stehle@arm.com>

EBBR.yaml

@@ -1974,3 +1974,23 @@
     test set: SimpleOutputProtocolTest
   update:
     comments: Mode 1 necessitates a 80x50 terminal
+
+# We add comments to the following tests failures for which we know a likely
+# cause, to help triaging/debugging.
+
+- rule: Add comments to boot services memory map test failure with ACS-IR
+    v21.05_0.8_BETA-0
+  criteria:
+    descr: SbbrBootServices Tests
+    device path: No device path
+    group: BootServicesTest
+    guid: 58A44F17-760E-478B-BAEF-E20BFBCD7457
+    log: MemoryMap Not Found
+    name: MemoryMap
+    result: FAILURE
+    revision: '0x00010000'
+    set guid: 8540C12D-5413-4A0B-A545-89A8E3C7DA4B
+    sub set: MemoryMap
+    test set: SbbrBootServices
+  update:
+    comments: This is a known issue with ACS-IR v21.05_0.8_BETA-0