Define LEXBOR_STATIC in ext/lexbor/config.w32 for static linkage

PHP bundles lexbor as a static-only extension (ext/lexbor/config.w32
declares EXTENSION("lexbor", ..., false /* never shared */)). On
Windows, ext/lexbor/lexbor/core/def.h defaults LXB_API to
__declspec(dllimport) when LEXBOR_STATIC is not defined, which causes
LNK2019 unresolved external symbol errors for every lxb_* function
referenced from consumers (ext/uri today, potentially others later)
when PHP itself is linked statically without a runtime DLL.

Add AC_DEFINE("LEXBOR_STATIC", 1, ...) in ext/lexbor/config.w32 so
the symbol is placed in main/config.w.h and seen by every PHP source
file that includes php.h before lexbor headers. This covers ext/uri
and any future consumer with one definition, in the right place for
configuration intent.

This change lives entirely in PHP-owned configuration (no modification
to the vendored ext/lexbor/lexbor/ tree), so it survives lexbor library
upgrades without re-application.

Author: luthermonson

NEWS

@@ -6,6 +6,11 @@ PHP                                                                        NEWS
   . Fixed bug GH-22121 (Double free in gdImageSetStyle() after
     overflow-triggered early return). (iliaal)
 
+- Lexbor:
+  . Define LEXBOR_STATIC in ext/lexbor/config.w32 so consumers of the
+    bundled lexbor headers (ext/uri etc.) do not see LXB_API as
+    __declspec(dllimport) on Windows static builds. (Luther Monson)
+
 - Zlib:
   . Fixed memory leak if deflate initialization fails and there is a dict.
     (ndossche)

ext/lexbor/config.w32

@@ -27,4 +27,11 @@ ADD_FLAG("CFLAGS_LEXBOR", "/D LEXBOR_BUILDING /utf-8");
 
 AC_DEFINE("HAVE_LEXBOR", 1, "Define to 1 if the PHP extension 'lexbor' is available.");
 
+// PHP bundles lexbor statically (EXTENSION above, false /* never shared */),
+// so consumers of lexbor headers (e.g. ext/uri) must not see LXB_API as
+// __declspec(dllimport) on Windows. AC_DEFINE places LEXBOR_STATIC in
+// main/config.w.h so every PHP source file picks it up before including
+// lexbor headers via php.h.
+AC_DEFINE("LEXBOR_STATIC", 1, "Define to 1 to disable dllimport on lexbor headers for PHP's static bundle.");
+
 PHP_INSTALL_HEADERS("ext/lexbor", "php_lexbor.h lexbor/");