Fix build (php#18716)

Author: arnaud-lb

ext/uri/config.m4

@@ -15,6 +15,6 @@ $URIPARSER_DIR/src/UriMemory.c $URIPARSER_DIR/src/UriNormalize.c $URIPARSER_DIR/
 $URIPARSER_DIR/src/UriParse.c $URIPARSER_DIR/src/UriParseBase.c $URIPARSER_DIR/src/UriQuery.c \
 $URIPARSER_DIR/src/UriRecompose.c $URIPARSER_DIR/src/UriResolve.c $URIPARSER_DIR/src/UriShorten.c"
 
-PHP_NEW_EXTENSION(uri, [php_uri.c $URIPARSER_SOURCES], [no],,[-I$ext_builddir/$URIPARSER_DIR/include -DURI_STATIC_BUILD -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1])
+PHP_NEW_EXTENSION(uri, [php_uri.c $URIPARSER_SOURCES], [no],,[-I$ext_srcdir/$URIPARSER_DIR/include -DURI_STATIC_BUILD -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1])
 PHP_ADD_EXTENSION_DEP(uri, lexbor)
 PHP_ADD_BUILD_DIR($ext_builddir/$URIPARSER_DIR/src $ext_builddir/$URIPARSER_DIR/include)