dev-python/matplotlib: bump to 2.2.4

Closes: https://bugs.gentoo.org/684798
Closes: https://bugs.gentoo.org/656262
Signed-off-by: Virgil Dupras <vdupras@gentoo.org>
Package-Manager: Portage-2.3.62, Repoman-2.3.11

dev-python/matplotlib/files/matplotlib-2.2.4-doc-fix.patch

@@ -0,0 +1,18 @@
+diff --git a/doc/conf.py b/doc/conf.py
+index 017ce210e..5a397082b 100644
+--- a/doc/conf.py
++++ b/doc/conf.py
+@@ -170,10 +170,10 @@ source_encoding = "utf-8"
+ master_doc = 'contents'
+ 
+ # General substitutions.
+-from matplotlib.compat.subprocess import check_output
+-SHA = check_output(['git', 'describe', '--dirty']).decode('utf-8').strip()
++#from matplotlib.compat.subprocess import check_output
++#SHA = check_output(['git', 'describe', '--dirty']).decode('utf-8').strip()
+ 
+-html_context = {'sha': SHA}
++#html_context = {'sha': SHA}
+ 
+ project = 'Matplotlib'
+ copyright = ('2002 - 2012 John Hunter, Darren Dale, Eric Firing, '