Fix Windows x86 build for ext/ffi

PR php#16351 introduced `EnumProcessModules()` calls, but this function is
undefined; thus, the compiler mangles the name according to the default
calling convention.  This lets linking succeed for x64, but fail for
x86.

To properly fix this, we include <Psapi.h> where the function is
declared.

Author: cmb69

ext/ffi/ffi.c

@@ -2975,6 +2975,7 @@ static zend_always_inline bool zend_ffi_validate_api_restriction(zend_execute_da
 	} while (0)
 
 #ifdef PHP_WIN32
+# include <Psapi.h>
 # ifndef DWORD_MAX
 #  define DWORD_MAX ULONG_MAX
 # endif