mesa: add patch to avoid mako failure

package/mesa/patches/patch-meson_build

@@ -0,0 +1,47 @@
+--- mesa-26.1.5.orig/meson.build	2026-07-15 22:03:19.000000000 +0200
++++ mesa-26.1.5/meson.build	2026-07-26 19:14:07.877439518 +0200
+@@ -1055,31 +1055,6 @@ foreach p : python_exec_list
+     continue
+   endif
+ 
+-  has_mako = run_command(
+-    prog_python, '-c',
+-    '''
+-import sys
+-
+-try:
+-    try:
+-        from packaging.version import Version
+-    except:
+-        from distutils.version import StrictVersion as Version
+-except:
+-    sys.exit(2)
+-
+-try:
+-    import mako
+-except:
+-    sys.exit(1)
+-
+-if Version(mako.__version__) < Version("0.8.0"):
+-    sys.exit(1)
+-''', check: false)
+-  if has_mako.returncode() != 0
+-    continue
+-  endif
+-
+   has_yaml = run_command(prog_python, '-c', 'import yaml', check: false)
+   if has_yaml.returncode() != 0
+     continue
+@@ -1092,12 +1067,6 @@ if not prog_python.found()
+   error('Python ' + python_version_req + ' not found')
+ endif
+ 
+-if has_mako.returncode() == 1
+-  error('Python (3.x) mako module >= 0.8.0 required to build mesa.')
+-elif has_mako.returncode() == 2
+-  error('One of Python (3.x) packaging or distutils module is required.')
+-endif
+-
+ if has_yaml.returncode() != 0
+   error('Python (3.x) yaml module (PyYAML) required to build mesa.')
+ endif