Added support for the CLIPS programming language

CLIPS or C language integrated production system is a tool for writing expert
systems.

lib/linguist/languages.yml

@@ -187,6 +187,7 @@ C++:
   - .hxx
   - .tcc
 
+
 C-ObjDump:
   type: data
   lexer: c-objdump
@@ -204,6 +205,10 @@ C2hs Haskell:
   extensions:
   - .chs
 
+CLIPS:
+  type: programming
+  primary_extension: .clp
+
 CMake:
   primary_extension: .cmake
   extensions: