platform_ToolchainOptions: Whitelist rtanalytics_main.

rtanalytics_main is needed to be built with libstdc++
because of bug b:73422412 .

BUG=chromium:826918
TEST=platform_ToolchainOptions passes on guado.

Change-Id: Iaf2f62afb50b51eab5de8d92dd79891f0d2af011
Reviewed-on: https://chromium-review.googlesource.com/984864
Commit-Ready: Manoj Gupta <manojgupta@chromium.org>
Tested-by: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Caroline Tice <cmtice@chromium.org>
Reviewed-by: Ting-Yuan Huang <laszio@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
diff --git a/client/site_tests/platform_ToolchainOptions/libstdcxx_whitelist b/client/site_tests/platform_ToolchainOptions/libstdcxx_whitelist
index e2c89a0..9cad665 100644
--- a/client/site_tests/platform_ToolchainOptions/libstdcxx_whitelist
+++ b/client/site_tests/platform_ToolchainOptions/libstdcxx_whitelist
@@ -11,3 +11,5 @@
 /usr/lib64/libSkyCamAICKBL.so
 # Part of prebuilt driver binary used in Tegra boards.
 /usr/lib/libnvmmlite_video.so
+# Whitelist rtanalytics_main (b/73422412).
+/opt/google/rta/rtanalytics_main