Add Xmake language

.gitmodules

@@ -1449,6 +1449,9 @@
 [submodule "vendor/grammars/xc.tmbundle"]
 	path = vendor/grammars/xc.tmbundle
 	url = https://github.com/graymalkin/xc.tmbundle
+[submodule "vendor/grammars/xmake-lua.tmbundle"]
+	path = vendor/grammars/xmake-lua.tmbundle
+	url = https://github.com/xmake-io/xmake-lua.tmbundle
 [submodule "vendor/grammars/xml.tmbundle"]
 	path = vendor/grammars/xml.tmbundle
 	url = https://github.com/textmate/xml.tmbundle

grammars.yml

@@ -1312,6 +1312,8 @@ vendor/grammars/wollok-sublime:
 - source.wollok
 vendor/grammars/xc.tmbundle:
 - source.xc
+vendor/grammars/xmake-lua.tmbundle:
+- source.xmake
 vendor/grammars/xml.tmbundle:
 - text.xml
 - text.xml.xsl

lib/linguist/languages.yml

@@ -8356,6 +8356,14 @@ XSLT:
   codemirror_mime_type: text/xml
   color: "#EB8CEB"
   language_id: 404
+Xmake:
+  type: programming
+  color: "#22a079"
+  filenames:
+  - xmake.lua
+  tm_scope: source.xmake
+  ace_mode: text
+  language_id: 225223071
 Xojo:
   type: programming
   color: "#81bd41"