made it so that ipc_stress_test doesn't get run with `build.sh tests`
diff --git a/aos/build/aos.gypi b/aos/build/aos.gypi
index 6f3364f..afbe6de 100644
--- a/aos/build/aos.gypi
+++ b/aos/build/aos.gypi
@@ -150,7 +150,11 @@
           ],
         }, {
           'variables': {
+            # Set this to 1 to disable rsyncing the file to the target.
             'no_rsync%': 0,
+            # Set this to 1 if this file isn't a test that should get run by
+            # `build.sh tests`.
+            'is_special_test%': 0,
           },
           'target_conditions': [
 # default to putting outputs into rsync_dir
diff --git a/aos/build/build.sh b/aos/build/build.sh
index eb639de..2bf6982 100755
--- a/aos/build/build.sh
+++ b/aos/build/build.sh
@@ -84,6 +84,6 @@
 END
   fi
   if [[ ${ACTION} == tests ]]; then
-    find ${OUTDIR}/Default/tests -executable -exec {} \;
+    find ${OUTDIR}/Default/tests -executable -exec ${AOS}/build/run_test.sh {} \;
   fi
 fi
diff --git a/aos/build/externals.gyp b/aos/build/externals.gyp
index 2bfee69..ac81553 100644
--- a/aos/build/externals.gyp
+++ b/aos/build/externals.gyp
@@ -170,9 +170,12 @@
       'direct_dependent_settings': {
         'include_dirs': ['<(externals)/gtest-<(gtest_version)/include'],
         'target_conditions': [
-          ['_type=="executable"', {
+          ['_type=="executable" and is_special_test==0', {
               'product_dir': '<(test_dir)',
             },
+          ], ['_type=="executable" and is_special_test==1', {
+              'product_dir': '<(test_dir)-special',
+            },
           ],
         ],
       },
diff --git a/aos/build/run_test.sh b/aos/build/run_test.sh
new file mode 100755
index 0000000..9da830b
--- /dev/null
+++ b/aos/build/run_test.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+# This gets called by build.sh to run a test.
+
+EXECUTABLE=$1
+
+echo "Running $(basename ${EXECUTABLE})."
+${EXECUTABLE}
+exit $?