Default LEXBOR_STATIC in bundled lexbor for Windows static builds

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.

Default LEXBOR_STATIC at the top of the vendored def.h so the
PHP-bundled copy is always static-API regardless of consumer. The
existing #ifndef-guarded block below this addition is preserved
verbatim so the change is functionally a no-op for callers that
already set LEXBOR_STATIC explicitly.

This is a vendor patch to a copy of upstream lexbor and will need to
be re-applied on the next lexbor upgrade (most recent was v2.7.0 per
8.5.6 NEWS); the patch is three lines and intentionally adjacent to
the existing LEXBOR_STATIC handling so it is unlikely to drift.

Author: luthermonson

NEWS

@@ -6,6 +6,11 @@ PHP                                                                        NEWS
   . Fixed bug GH-22121 (Double free in gdImageSetStyle() after
     overflow-triggered early return). (iliaal)
 
+- Lexbor:
+  . Default LEXBOR_STATIC in the bundled lexbor headers so consumers
+    (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/lexbor/core/def.h

@@ -32,6 +32,14 @@
 
 #define LEXBOR_MEM_ALIGN_STEP sizeof(void *)
 
+/* PHP bundles lexbor as a static-only extension
+ * (ext/lexbor/config.w32 declares EXTENSION(..., false / * never shared * /)).
+ * Force the static API decoration so consumers (ext/uri, etc.) do not see
+ * __declspec(dllimport) on Windows and fail to link. */
+#ifndef LEXBOR_STATIC
+#define LEXBOR_STATIC
+#endif
+
 #ifndef LEXBOR_STATIC
     #ifdef _WIN32
         #ifdef LEXBOR_BUILDING