mac: Actually include libc++ headers in clang package.

Follow-up to r270095 where I tried to do this already, but wasn't quite
successful. (It worked on my box, but nowhere else.)

BUG=400088
R=hans@chromium.org

Review URL: https://codereview.chromium.org/440813003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287585 0039d316-1c4b-4281-b951-d872f2087c98

tools/clang/scripts/package.sh

@@ -158,7 +158,11 @@ fi
 
 cp -R "${LLVM_LIB_DIR}/clang" $PDIR/lib
 
-tar zcf $PDIR.tgz -C $PDIR bin lib buildlog.txt
+if [ "$(uname -s)" = "Darwin" ]; then
+  tar zcf $PDIR.tgz -C $PDIR bin include lib buildlog.txt
+else
+  tar zcf $PDIR.tgz -C $PDIR bin lib buildlog.txt
+fi
 
 if [ "$(uname -s)" = "Darwin" ]; then
   PLATFORM=Mac