add uncrustify fixer for several languages

autoload/ale/fixers/uncrustify.vim

@@ -0,0 +1,16 @@
+" Author: Derek P Sifford <dereksifford@gmail.com>
+" Description: Fixer for C, C++, C#, ObjectiveC, D, Java, Pawn, and VALA.
+
+call ale#Set('c_uncrustify_executable', 'uncrustify')
+call ale#Set('c_uncrustify_options', '')
+
+function! ale#fixers#uncrustify#Fix(buffer) abort
+    let l:executable = ale#Var(a:buffer, 'c_uncrustify_executable')
+    let l:options = ale#Var(a:buffer, 'c_uncrustify_options')
+
+    return {
+    \   'command': ale#Escape(l:executable)
+    \       . ' --no-backup'
+    \       . (empty(l:options) ? '' : ' ' . l:options)
+    \}
+endfunction