[UBSan][roughtime] Temporarily disable UBSan

UBSan was complaining about a load of a misaligned address.
Disable UBSan for this target for now, then we will come back to fix it
once asan-ubsan is migrated into CQ.

Bug: 47040
Change-Id: I2b69a253cfa8f3f7433405ad30266b520ac737ff
diff --git a/BUILD.gn b/BUILD.gn
index fe40d68..a8c4e03 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -54,6 +54,10 @@
     "//third_party/boringssl",
     "//third_party/glog",
   ]
+
+  # TODO(47040): UBSan has found an instance of undefined behavior in this target.
+  # Disable UBSan for this target temporarily until it is migrated into CI/CQ.
+  configs += [ "//build/config:temporarily_disable_ubsan_do_not_use" ]
 }
 
 static_library("client_lib") {
@@ -68,4 +72,8 @@
     "//third_party/boringssl",
     "//third_party/glog",
   ]
+
+  # TODO(47040): UBSan has found an instance of undefined behavior in this target.
+  # Disable UBSan for this target temporarily until it is migrated into CI/CQ.
+  configs += [ "//build/config:temporarily_disable_ubsan_do_not_use" ]
 }