vim: change leg support to use submodule instead of import

Signed-off-by: Alejandro Mery <amery@geeks.cl>

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "3rd-party/cocci-syntax"]
 	path = 3rd-party/cocci-syntax
 	url = https://github.com/ahf/cocci-syntax
+[submodule "3rd-party/leg.vim"]
+	path = 3rd-party/leg.vim
+	url = https://github.com/Qix-/leg.vim

3rd-party/leg.vim

@@ -0,0 +1 @@
+Subproject commit acff328e93bd3961945fb5b484985af1447a8b59

files/.vim/ftdetect/leg.vim

@@ -1 +0,0 @@
-au BufRead,BufNewFile *.leg set ft=leg

files/.vim/ftdetect/leg.vim

@@ -0,0 +1 @@
+../../../3rd-party/leg.vim/ftdetect/leg.vim

files/.vim/syntax/leg.vim

@@ -1,55 +0,0 @@
-" Vim syntax file
-" Language: Parser Expression Grammars (PEG) -- LEG dialect
-" Maintainer: Gianni Chiappetta, Josh Junon
-" Latest Revision: 2016-10-06
-
-if exists("b:current_syntax")
-  finish
-endif
-
-syn include @c syntax/cpp.vim
-
-syn match   legRuleIdentifier   /^\v[-a-zA-Z_][-a-zA-Z_0-9]*/ skipwhite skipnl nextgroup=legSeperator
-
-syn match   legSeperator        "=" skipwhite skipnl contained nextgroup=legExpression
-
-syn match   legExpression       /\v[^\;]*/ contained skipwhite skipnl contains=legDelimiter,legOrderedChoice,legGrouping,legSpecial,legRange,legTerminal,legNonTerminal,legQuantifier,legRuleBody
-syn match   legDelimiter        /[§]/ contained display
-syn region  legGrouping         matchgroup=legDelimiter start=/(/ end=/)/ contained skipwhite keepend contains=legExpression display
-syn match   legSpecial          /[!&ϵ^]/ contained display
-syn match   legOrderedChoice    /\v\|/ display
-syn region  legRange            matchgroup=legDelimiter start=/\[^/ start=/\[/ end=/\]/ contained skipwhite contains=legRangeValue,legUnicode display
-syn match   legRangeValue       /\d\+-\d\+/ contained display
-syn match   legRangeValue       /\a\+-\a\+/ contained display
-syn region  legTerminal         matchgroup=legDelimiter start=/"/ end=/"/ contained display
-syn region  legTerminal         matchgroup=legDelimiter start=/'/ end=/'/ contained display
-syn match   legUnicode          /U+[A-F0-9]\{4,6}/ contained display
-syn match   legNonTerminal      /\a+/ contained display
-syn match   legQuantifier       /[+\*?]/ contained display
-syn match   legQuantifier       /{\d\+,\d\+}/ contained display
-syn match   legQuantifier       /{\d\+}/ contained display
-syn match   legSpecialSymbol    /\v\$\$/ contained display
-syn region  legRuleBody         matchgroup=legCDelimiter start=/\v([@~]\s*)?\{/ end=/}/ contains=legSpecialSymbol,@c
-
-syn match   legComment          /#.*$/ contains=legTodo
-syn keyword legTodo             TODO FIXME XXX NOTE contained
-
-syn region  legCBlock           matchgroup=legCDelimiter start=/\v^\%\{/ end=/\v\%\}$/ keepend contains=@c
-syn region  legCBlock           matchgroup=legCDelimiter start=/\v\%\%/ skip=/\v.*/ end=/$/ excludenl contains=@c
-
-hi link legOrderedChoice  legSeperator
-
-hi link legRuleIdentifier Statement
-hi link legSeperator      Conditional
-hi link legDelimiter      Delimiter
-hi link legCDelimiter     Conditional
-hi link legSpecial        Special
-hi link legComment        Comment
-hi link legRangeValue     Constant
-hi link legTerminal       String
-hi link legUnicode        Constant
-hi link legQuantifier     Function
-hi link legTodo           Todo
-hi link legSpecialSymbol  Special
-
-let b:current_syntax = "leg"

files/.vim/syntax/leg.vim

@@ -0,0 +1 @@
+../../../3rd-party/leg.vim/syntax/leg.vim