mojo/shared: Added a utility func to run the mojo shell

MultiPart: 2/2
Change-Id: I8348e58e763090981c4fff5c94567b94a2b4b8be
diff --git a/mojo.mk b/mojo.mk
index a9057a3..703bbfb 100644
--- a/mojo.mk
+++ b/mojo.mk
@@ -59,6 +59,10 @@
 	$(MOJO_DIR)/src/mojo/public/tools/bindings/mojom_bindings_generator.py $1 -d . -o $2 -g $3
 endef
 
+define MOJO_RUN
+	$(MOJO_DIR)/src/mojo/devtools/common/mojo_run --config-file $(PWD)/mojoconfig $(MOJO_SHELL_FLAGS) $(MOJO_ANDROID_FLAGS) $1
+endef
+
 # Builds the library that Mojo services must be linked with.
 $(MOJO_SHARED_LIB): | mojo-env-check
 	mkdir -p $(dir $@)