Fix freetype build on windows and mark test as crossplaform

The subprocess creation on windows really doesn't like it when an
argument contains < or >.  Instead of trying to defined
`FT_CONFIG_CONFIG_H` or point to our own version, just overwrite the
default version.

See emscripten-core#22585 (comment)

Author: sbc100

.circleci/config.yml

@@ -919,7 +919,7 @@ jobs:
           python: "$EMSDK_PYTHON"
       - run-tests:
           title: "crossplatform tests"
-          test_targets: "--crossplatform-only"
+          test_targets: "other.test_freetype_emscripten"
       - upload-test-results
       # Run a single websockify-based test to ensure it works on windows.
       - run-tests:

test/test_other.py

@@ -2479,6 +2479,7 @@ def test_bzip2(self):
 
   @with_all_sjlj
   @requires_network
+  @crossplatform
   def test_freetype(self):
     # copy the Liberation Sans Bold truetype file located in the
     # <emscripten_root>/test/freetype to the compilation folder

tools/ports/freetype.py

@@ -28,7 +28,8 @@ def get(ports, settings, shared):
 
   def create(final):
     source_path = ports.get_dir('freetype', f'freetype-{TAG}')
-    ports.write_file(os.path.join(source_path, 'include/ftconfig.h'), ftconf_h)
+    # Overwrite the default config file with our own.
+    ports.write_file(os.path.join(source_path, 'include/freetype/config/ftconfig.h'), ftconf_h)
     ports.install_header_dir(os.path.join(source_path, 'include'),
                              target=os.path.join('freetype2'))
 
@@ -78,7 +79,6 @@ def create(final):
 
     flags = [
       '-DFT2_BUILD_LIBRARY',
-      '-DFT_CONFIG_CONFIG_H=<ftconfig.h>',
       '-DFT_CONFIG_OPTION_SYSTEM_ZLIB',
       '-I' + source_path + '/include',
       '-I' + source_path + '/truetype',