Relative resource paths in sub edc files are based on the current working
directory.
To support relative resource paths in sub edc files, set main edc file's
directory as the working directory when edje_cc is executed.
Test Plan:
1. Create "main.edc" in "./edc/" directory.
2. Create "sub.edc" in "./edc/sub/" directory.
3. Create "icon.png" in "./edc/image/" directory.
4. "main.edc" includes "sub.edc". (i.e. #include "./sub/sub.edc")
5. "sub.edc" uses "icon.png".
(i.e. images.image: "./image/icon.png" COMP;)
6. Open "main.edc" in the current working directory.
(i.e. enventor -w ./edc ./edc/main.edc -i ./edc/image)
if the edc file path is changed, the build command should be updated.
Before this fix, it missed updation so the live view wasn't updated even if new template is selected.