Add support for GDB scripts (#456)

README.md

@@ -378,6 +378,7 @@ Forth
 FORTRAN Legacy
 FORTRAN Modern
 F*
+GDB Script
 GDScript
 Gherkin (Cucumber)
 GLSL

languages.json

@@ -666,6 +666,16 @@
                 "fsscript"
             ]
         },
+	"GDB":{
+	    "name":"GDB Script",
+	    "base":"hash",
+            "line_comment":[
+                "#"
+            ],
+	    "extensions":[
+		    "gdb"
+	    ]
+	},
         "GdScript":{
             "name":"GDScript",
             "base":"hash",

tests/data/gdb.gdb

@@ -0,0 +1,15 @@
+# 15 lines 7 code 5 comments 3 blanks
+#
+# This is a comment line. We don't have multi-comment lines
+#
+
+macro define offsetof(_type, _memb)       ((long)(&((_type *)0)->_memb))
+
+break foo
+continue
+
+# Let's have something print when a breakpoint is hit.
+commands 2
+  p i
+  continue
+end