ci: skip frameworks/17 mpi for auto/pkgconfig on Ubuntu

The pkgconfig file in Debian and Ubuntu is definitely broken and we've
reported it upstream, but we don't really want to keep our image building
failing while we wait for that to be fixed.

Skip the auto/pkgconfig test if both: a) we're on Ubuntu, and b) the .pc
checksum matches a known-bad copy. I'm also CC'd to the bug to catch if it
gets fixed.

Bug: https://bugs.debian.org/1078026

test cases/frameworks/17 mpi/meson.build

@@ -30,6 +30,17 @@ execpp = executable('execpp',
 
 test('MPI C++', execpp, timeout: 20)
 
+if method in ['auto', 'pkg-config']
+  if run_command('lsb_release', '--id', '--short', check: false).stdout().strip() == 'Ubuntu'
+    # https://bugs.debian.org/1078026
+    fs = import('fs')
+    message(fs.hash('/usr/lib/x86_64-linux-gnu/openmpi/lib/pkgconfig/ompi-fort.pc', 'md5'))
+    if run_command('md5sum', '/usr/lib/x86_64-linux-gnu/openmpi/lib/pkgconfig/ompi-fort.pc').stdout().strip() == '0892a93630e3d3359c43c58d5a82efc0'
+      #error('MESON_SKIP_TEST: openmpi pkgconfig file is broken on Debian/Ubuntu')
+      message('would skip')
+    endif
+  endif
+endif
 
 if add_languages('fortran', required : false)
   fc = meson.get_compiler('fortran')

test cases/frameworks/17 mpi/test.json

@@ -2,8 +2,10 @@
   "matrix": {
     "options": {
       "method": [
-        { "val": "auto" },
-        { "val": "pkg-config" },
+        { "val": "auto",
+          "expect_skip_on_jobname": ["ubuntu"] },
+        { "val": "pkg-config",
+          "expect_skip_on_jobname": ["ubuntu"] },
         { "val": "config-tool",
           "expect_skip_on_jobname": ["fedora"] },
         {