mingw: fix broken strawberry perl paths

github's mingw is incompatible to old strawberry's 5.32 mingw.
See e.g. actions/runner-images#5459

.github/workflows/testsuite.yml

@@ -132,6 +132,10 @@ jobs:
       - uses: actions/checkout@master
       - run: perl -V
       - run: perl Makefile.PL
+      - run: echo $PATH
+        shell: bash
       #- run: prove -vb t/*.t
-      - run: make test
+      # https://github.com/actions/runner-images/issues/5459
+      - run: PATH="/c/Strawberry/c/bin:/c/Strawberry/perl/site/bin:/c/Strawberry/perl/bin:/c/ProgramData/Chocolatey/bin:/c/Windows/system32:/c/Windows:/usr/bin" make test
+        shell: bash
         #continue-on-error: true

Makefile.PL

@@ -23,7 +23,7 @@ WriteMakefile(
     'Test::Pod'           => '1.22',
     'Test::More'          => 0,
   },
-   (eval { ExtUtils::MakeMaker->VERSION('6.52'); 1 } ?
+  (eval { ExtUtils::MakeMaker->VERSION('6.52'); 1 } ?
     ('CONFIGURE_REQUIRES' =>
      {
       'Crypt::OpenSSL::Guess' => '0.11',