[GLib] mesonbuild failures in Travis CI

[asfimport]

Something started breaking recently with mesonbuild

+env CFLAGS=-DARROW_NO_DEPRECATED_API CXXFLAGS=-DARROW_NO_DEPRECATED_API meson build --prefix=/home/travis/build/apache/arrow/c-glib-install-meson -Dgtk_doc=true
Traceback (most recent call last):
  File "/home/travis/miniconda/bin/meson", line 26, in <module>
    from mesonbuild import mesonmain
ModuleNotFoundError: No module named 'mesonbuild'

Perhaps caused by the 8/25 release? https://pypi.org/project/meson/#history

Reporter: Wes McKinney / @wesm
Assignee: Kouhei Sutou / @kou

PRs and other links:

• GitHub Pull Request #2972

_{Note: This issue was originally created as ARROW-3186. Please see the migration documentation for further details.}

[asfimport]

Wes McKinney / @wesm:
I am triaging this for the time being in #2507 by pinning to meson==0.47.1, which seems to fix the issue

https://travis-ci.org/apache/arrow/jobs/425578856

[asfimport]

Wes McKinney / @wesm:
@kou there have been a few releases since this issue originally occurred. Does the build work with the latest meson release now (0.48.2)?

[asfimport]

Kouhei Sutou / @kou:
It should work.
If it doesn't work, we should report it to Meson.

[asfimport]

Wes McKinney / @wesm:
Issue resolved by pull request 2972
#2972