Tests: Add x32 tests to test suite

Tests/CMakeOnly/find_library/CMakeLists.txt

Tests/CMakeOnly/find_library/lib/A/libx32/libtest3.a

Tests/CMakeOnly/find_library/lib/x32/libtest2.a

Tests/CMakeOnly/find_library/libx32/A/lib/libtest2.a

Tests/CMakeOnly/find_library/libx32/A/libtest1.a

Tests/CMakeOnly/find_library/libx32/A/libx32/libtest1.a

Tests/CMakeOnly/find_library/libx32/libtest1.a

...ke/FindPkgConfig/FindPkgConfig_CMAKE_APPBUNDLE_PATH.cmake

...ke/FindPkgConfig/FindPkgConfig_CMAKE_FRAMEWORK_PATH.cmake

...RunCMake/FindPkgConfig/FindPkgConfig_PKGCONFIG_PATH.cmake

...dPkgConfig_PKGCONFIG_PATH_NO_CMAKE_ENVIRONMENT_PATH.cmake

...kgConfig/FindPkgConfig_PKGCONFIG_PATH_NO_CMAKE_PATH.cmake

...nCMake/FindPkgConfig/pc-bar/libx32/pkgconfig/.placeholder

...nCMake/FindPkgConfig/pc-foo/libx32/pkgconfig/.placeholder