Add /usr/share/profiling to COMMON_INSTALL_MASK

This directory contains profiling/coverage data that is generated by some
packages during the build process. It should not be installed onto the device,
but we want the data to live on in /build to allow developers to consult it.

BUG=chromium-os:37854
TEST=None, this change will be tested in CL 42339 since it currently has not
     effect

Change-Id: I882fa7a7496db52a72bb8c5409b3715490d95879
Reviewed-on: https://gerrit.chromium.org/gerrit/42499
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Tested-by: Ryan Harrison <rharrison@chromium.org>
diff --git a/common.sh b/common.sh
index a33a1f1..78a0cc3 100644
--- a/common.sh
+++ b/common.sh
@@ -412,6 +412,7 @@
   /usr/share/man
   /usr/share/openrc
   /usr/share/pkgconfig
+  /usr/share/profiling
   /usr/share/readline
   /usr/src
   "