patch 9.1.0249: filetype: rock_manifest and config.ld files are not recognized

Problem:  filetype: rock_manifest and config.ld files are not recognized
Solution: Detect 'rock_manifest' and 'config.ld' as lua
          (Wu, Zhenyu)

closes: #14370

Signed-off-by: Wu, Zhenyu <wuzhenyu@ustc.edu>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index a8c7ef4..19846d9 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -396,7 +396,7 @@
     lpc: ['file.lpc', 'file.ulpc'],
     lsl: ['file.lsl'],
     lss: ['file.lss'],
-    lua: ['file.lua', 'file.tlu', 'file.rockspec', 'file.nse', '.luacheckrc', '.busted'],
+    lua: ['file.lua', 'file.tlu', 'file.rockspec', 'file.nse', '.luacheckrc', '.busted', 'rock_manifest', 'config.ld'],
     luau: ['file.luau'],
     lynx: ['lynx.cfg'],
     lyrics: ['file.lrc'],
diff --git a/src/version.c b/src/version.c
index 7eb84b7..5278867 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    249,
+/**/
     248,
 /**/
     247,