Add hcl support, closes #403

indent/hcl.vim

@@ -0,0 +1,15 @@
+if exists('g:polyglot_disabled') && index(g:polyglot_disabled, 'hcl') != -1
+  finish
+endif
+
+if exists('b:did_indent')
+  finish
+endif
+
+let b:did_indent = 1
+
+" cindent seems to work adequately with HCL's brace-y syntax
+setlocal cindent
+
+" don't de-indent comments (cindent treats them like preprocessor directives)
+setlocal cinkeys-=0#