Add note about libslirp-dev

Author: Gulshan Singh

config/trusty/qemu-qemu-inc.mk

@@ -64,11 +64,7 @@ $(QEMU_MAKEFILE): QEMU_AOSP_DISABLES:=$(QEMU_AOSP_DISABLES)
 $(QEMU_MAKEFILE): QEMU_EXTRA_CFLAGS:=$(QEMU_EXTRA_CFLAGS)
 $(QEMU_MAKEFILE):
 	mkdir -p $(QEMU_BUILD_BASE)
-	#--with-git=true sets the "git" program to /bin/true - it essentially disables git
-	#--disable-git-update may look like what we want, but it requests manual intervention, not disables git
-	# TODO(b/148904400): Our prebuilt Clang can't build QEMU yet, and there is no
-	# prebuilts GCC, i.e. currently we can only build QEMU with host toolchain. On
-	# some hosts compiler will complain about stringop truncation.
+	# Note: `libslirp-dev` must be installed before running this command
 	cd $(QEMU_BUILD_BASE) && $(abspath $(QEMU_ROOT)/configure) \
 		--target-list=$(QEMU_TARGET) --disable-werror \
 		--extra-cflags="$(QEMU_EXTRA_CFLAGS)" \