[strawberryperl] allow .pc files

[SSE4]

allow *.pc files for perl, otherwise I have an error while building libpq:

Can't locate Win32API/File/cFile.pc in @INC (@INC contains: C:\Users\SSE4\.conan\data\libpq\11.5\bincrafters\testing\build\66397d4e4f72ab2f3a4c316d3e5132059c9ebf7b\source_subfolder\src\tools\msvc C:/.conan/3eefa9/1/lib) at C:/.conan/3eefa9/1/lib/Win32API/File.pm line 177.
Compilation failed in require at C:\Users\SSE4\.conan\data\libpq\11.5\bincrafters\testing\build\66397d4e4f72ab2f3a4c316d3e5132059c9ebf7b\source_subfolder\src\tools\msvc/Mkvcbuild.pm line 645.
BEGIN failed--compilation aborted at C:\Users\SSE4\.conan\data\libpq\11.5\bincrafters\testing\build\66397d4e4f72ab2f3a4c316d3e5132059c9ebf7b\source_subfolder\src\tools\msvc/Mkvcbuild.pm line 645.
Compilation failed in require at build.pl line 13.
BEGIN failed--compilation aborted at build.pl line 13.

perl's .pc files seems to have nothing to do with pkg-config: https://github.com/chorny/Win32API-File/blob/master/cFile.pc

related to #188

Specify library name and version: strawberryperl/5.30.0.1

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[conan-center-bot]

Some configurations of 'strawberryperl/5.28.1.1' have failed:

• Windows x86_64, Debug, Visual Studio 14, MTd
  • Hooks errors detected:
    • [HOOK - conan-center.py] pre_export(): ERROR: [META LINES (KB-H025)] PEP 263 (encoding) is not allowed in the conanfile. Remove the line 1 (https://github.com/conan-io/conan-center-index/wiki/Error-Knowledge-Base#KB-H025)
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[conan-center-bot]

All green! 😊

• strawberryperl/5.28.1.1: Generated 1 packages. All logs here
• strawberryperl/5.30.0.1: Generated 1 packages. All logs here