org-babel-current-exec-src-block-head -> org-babel-current-src-block-location
* lisp/ob-core.el (org-babel-current-src-block-location): Rename
org-babel-current-exec-src-block-head to
org-babel-current-src-block-location.
(org-babel-execute-src-block): Rename
org-babel-current-exec-src-block-head to
org-babel-current-src-block-location.
* lisp/ob-exp.el (org-babel-exp-results): Rename
org-babel-current-exec-src-block-head to
org-babel-current-src-block-location.
* lisp/ob-lob.el (org-babel-lob-execute): Rename
org-babel-current-exec-src-block-head to
org-babel-current-src-block-location.