Apply pdfium_core_config to fuzzer_init_public

Since fuzzer_init_public.h includes some //core headers, make sure it
uses a build config that is sufficiently similar to the ones used in
other parts of PDFium.

Change-Id: I9bc665dac771d49c155c6dbe0a61d1220c36ea28
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/112430
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/testing/fuzzers/BUILD.gn b/testing/fuzzers/BUILD.gn
index 698987f..6c915cb 100644
--- a/testing/fuzzers/BUILD.gn
+++ b/testing/fuzzers/BUILD.gn
@@ -128,6 +128,7 @@
   testonly = true
   sources = [ "pdf_fuzzer_init_public.cc" ]
   include_dirs = [ "../.." ]
+  configs += [ "../../:pdfium_core_config" ]
   deps = [
     ":fuzzer_utils",
     "../../:pdfium_public_headers",