Augment target filepath by working directory when checking if module satisfies target

This fixes a spurious warning in -Wmissing-home-modules.

This is a simple oversight where when looking for the target in the
first place we augment the search by the -working-directory flag but
then fail to do so when checking this warning.

Fixes #22676

compiler/GHC/Driver/Make.hs

@@ -347,7 +347,7 @@ warnMissingHomeModules dflags targets mod_graph =
           TargetFile target_file _
             | Just mod_file <- ml_hs_file (ms_location mod)
             ->
-             target_file == mod_file ||
+             augmentByWorkingDirectory dflags target_file == mod_file ||
 
              --  Don't warn on B.hs-boot if B.hs is specified (#16551)
              addBootSuffix target_file == mod_file ||

testsuite/tests/warnings/should_compile/all.T

@@ -55,3 +55,4 @@ test('T18862b', normal, compile, [''])
 test('T20312', normal, compile,['-Wall'])
 test('T22151', normal, compile, ['-Wredundant-constraints'])
 test('T22759', normal, compile, [''])
+test('T22676', [extra_files(['src'])], multimod_compile, ['src.hs', '-working-dir src -Wmissing-home-modules -v0'])

testsuite/tests/warnings/should_compile/src/src.hs

+module Main where
+
+main = print ()