syntax: Prevent syntax/javascript.vim from overriding our syn sync

Unfortunately the main_syntax trick doesn't prevent javascript.vim from
doing syn sync fromstart. This is most likely a bug in javascript.vim
and I'll submit a pull request to vim to fix this. Luckily setting
main_syntax does prevent javascript.vim from introducing its own syncing
rules, it just overrides minlines and maxlines, so we can work around it
by moving the syn sync minlines to the end.

Author: liskin

syntax/elixir.vim

@@ -8,9 +8,6 @@ endif
 let s:cpo_save = &cpo
 set cpo&vim
 
-" syncing starts 2000 lines before top line so docstrings don't screw things up
-syn sync minlines=2000
-
 syn cluster elixirNotTop contains=@elixirRegexSpecial,@elixirStringContained,@elixirDeclaration,elixirTodo,elixirArguments,elixirBlockDefinition,elixirUnusedVariable,elixirStructDelimiter
 syn cluster elixirRegexSpecial contains=elixirRegexEscape,elixirRegexCharClass,elixirRegexQuantifier,elixirRegexEscapePunctuation
 syn cluster elixirStringContained contains=elixirInterpolation,elixirRegexEscape,elixirRegexCharClass
@@ -175,6 +172,9 @@ syn match  elixirExUnitMacro "\C\(^\s*\)\@<=\<\(test\|describe\|setup\|setup_all
 syn match  elixirExUnitAssert "\C\(^\s*\)\@<=\<\(assert\|assert_in_delta\|assert_raise\|assert_receive\|assert_received\|catch_error\)\>"
 syn match  elixirExUnitAssert "\C\(^\s*\)\@<=\<\(catch_exit\|catch_throw\|flunk\|refute\|refute_in_delta\|refute_receive\|refute_received\)\>"
 
+" syncing starts 2000 lines before top line so docstrings don't screw things up
+syn sync minlines=2000
+
 hi def link elixirBlockDefinition            Define
 hi def link elixirDefine                     Define
 hi def link elixirPrivateDefine              Define