ARROW-5641: [GLib] Remove enums files generated by GNU Autotools from Git targets
ARROW-5641: [GLib] Remove enums files generated by GNU Autotools from Git targets

This PR removes the following enums files from Git targets.

- gandiva-glib/enums.c
- gandiva-glib/enums.h
- gandiva-glib/stamp-enums.c
- gandiva-glib/stamp-enums.h

Author: Yosuke Shiro <yosuke.shiro615@gmail.com>

Closes #4604 from shiro615/glib-remove-enums-files-git-targets and squashes the following commits:

26f190797 <Yosuke Shiro>  Remove enums files generated by GNU Autotools from Git targets

wesm/arrow,xhochy/arrow,xhochy/arrow,icexelloss/arrow,laurentgo/arrow,laurentgo/arrow,wesm/arrow,kou/arrow,apache/arrow,kou/arrow,icexelloss/arrow,majetideepak/arrow,wesm/arrow,laurentgo/arrow,renesugar/arrow,cpcloud/arrow,laurentgo/arrow,kou/arrow,apache/arrow,wesm/arrow,laurentgo/arrow,renesugar/arrow,apache/arrow,icexelloss/arrow,wesm/arrow,xhochy/arrow,majetideepak/arrow,majetideepak/arrow,majetideepak/arrow,renesugar/arrow,renesugar/arrow,cpcloud/arrow,apache/arrow,xhochy/arrow,kou/arrow,icexelloss/arrow,icexelloss/arrow,renesugar/arrow,cpcloud/arrow,renesugar/arrow,majetideepak/arrow,cpcloud/arrow,xhochy/arrow,laurentgo/arrow,cpcloud/arrow,icexelloss/arrow,renesugar/arrow,renesugar/arrow,renesugar/arrow,xhochy/arrow,icexelloss/arrow,apache/arrow,apache/arrow,majetideepak/arrow,xhochy/arrow,wesm/arrow,wesm/arrow,kou/arrow,majetideepak/arrow,xhochy/arrow,majetideepak/arrow,cpcloud/arrow,apache/arrow,kou/arrow,xhochy/arrow,xhochy/arrow,icexelloss/arrow,cpcloud/arrow,wesm/arrow,laurentgo/arrow,kou/arrow,majetideepak/arrow,xhochy/arrow,laurentgo/arrow,kou/arrow,icexelloss/arrow,laurentgo/arrow,laurentgo/arrow,xhochy/arrow,wesm/arrow,majetideepak/arrow,cpcloud/arrow,laurentgo/arrow,laurentgo/arrow,apache/arrow,cpcloud/arrow,kou/arrow,kou/arrow,laurentgo/arrow,majetideepak/arrow,cpcloud/arrow,apache/arrow,cpcloud/arrow,cpcloud/arrow,apache/arrow,majetideepak/arrow,apache/arrow,majetideepak/arrow,wesm/arrow,cpcloud/arrow,icexelloss/arrow,icexelloss/arrow,laurentgo/arrow,renesugar/arrow,majetideepak/arrow,renesugar/arrow,kou/arrow,kou/arrow,apache/arrow,wesm/arrow,wesm/arrow,laurentgo/arrow,icexelloss/arrow,xhochy/arrow,majetideepak/arrow,xhochy/arrow,kou/arrow,apache/arrow,renesugar/arrow,xhochy/arrow,apache/arrow,renesugar/arrow,icexelloss/arrow,wesm/arrow,cpcloud/arrow,renesugar/arrow,renesugar/arrow,icexelloss/arrow,wesm/arrow,kou/arrow