Get all our roborio tools loading downloaded .sos

This is the last piece to make `bazel build --cpu=roborio //...` work on
a barebones Stretch system.

Change-Id: I87b8737ee479dd16c9421f81a42c5ecf6413f822
diff --git a/tools/cpp/arm-frc-linux-gnueabi/arm-frc-linux-gnueabi-gcov b/tools/cpp/arm-frc-linux-gnueabi/arm-frc-linux-gnueabi-gcov
index a3c71c3..35d71c2 100755
--- a/tools/cpp/arm-frc-linux-gnueabi/arm-frc-linux-gnueabi-gcov
+++ b/tools/cpp/arm-frc-linux-gnueabi/arm-frc-linux-gnueabi-gcov
@@ -1,5 +1,9 @@
 #!/bin/bash --norc
 
+LD_LIBRARY_PATH="${BAZEL_OUTPUT_ROOT}external/arm_frc_gnueabi_deps/usr/lib/x86_64-linux-gnu"
+LD_LIBRARY_PATH+=":${BAZEL_OUTPUT_ROOT}external/arm_frc_gnueabi_deps/lib/x86_64-linux-gnu"
+export LD_LIBRARY_PATH
+
 exec -a arm-frc-linux-gnueabi-gcov \
 	"${BAZEL_OUTPUT_ROOT}external/arm_frc_linux_gnueabi_repo/usr/bin/arm-frc-linux-gnueabi-gcov" \
 	"$@"