Makefile test target uses new apps= syntax

* only if uncommented

rebar.config

@@ -22,7 +22,7 @@
                       %% Uncomment the following options to enable pulse testing. Note that
                       %% this will (currently) break all tests that do NOT use Pulse. As such,
                       %% this is most useful when used w/ rebar like so:
-                      %% ./rebar compile eunit app=bitcask suite=merge_pulse_qc
+                      %% ./rebar compile eunit apps=bitcask suite=merge_pulse_qc
                       %%
                       %% NOTE: You'll have to do a "clean" to ensure everything gets compiled w/
                       %% the new flags!