Bug 794723 - Add a default makefile which wraps mach. r=gps
This makes it easier for new contributors to get a build started
without having to know about our mach driver.
# This Makefile is used as a shim to aid people with muscle memory
# so that they can type "make".
#
# This file and all of its targets should not be used by anything important.
all: build
build:
./mach build
clean:
./mach clobber
.PHONY: all build clean
