[build]: Move the mounting point inside the docker to home directory (#1522)

* Move the mounting point inside the docker to home directory

Signed-off-by: Wenda <[email protected]>

* Change mount point to src under the home directory

Signed-off-by: Wenda <[email protected]>

Author: wendani

Makefile

@@ -14,7 +14,7 @@
 #  * USERNAME: Desired username -- default at rules/config
 #  * PASSWORD: Desired password -- default at rules/config
 #  * KEEP_SLAVE_ON: Keeps slave container up after building-process concludes.
-#  * SOURCE_FOLDER: host path to be mount as /var/src, only effective when KEEP_SLAVE_ON=yes
+#  * SOURCE_FOLDER: host path to be mount as /var/$(USER)/src, only effective when KEEP_SLAVE_ON=yes
 #  * SONIC_BUILD_JOB: Specifying number of concurrent build job(s) to run
 #
 ###############################################################################
@@ -85,7 +85,7 @@ SONIC_BUILD_INSTRUCTION :=  make \
 	    $(DOCKER_BUILD) ; }
 ifeq "$(KEEP_SLAVE_ON)" "yes"
     ifdef SOURCE_FOLDER
-		@$(DOCKER_RUN) -v $(SOURCE_FOLDER):/var/src $(SLAVE_IMAGE):$(SLAVE_TAG) bash -c "$(SONIC_BUILD_INSTRUCTION) $@; /bin/bash"
+		@$(DOCKER_RUN) -v $(SOURCE_FOLDER):/var/$(USER)/src $(SLAVE_IMAGE):$(SLAVE_TAG) bash -c "$(SONIC_BUILD_INSTRUCTION) $@; /bin/bash"
     else
 		@$(DOCKER_RUN) $(SLAVE_IMAGE):$(SLAVE_TAG) bash -c "$(SONIC_BUILD_INSTRUCTION) $@; /bin/bash"
     endif