patch 8.1.0507: .raml files not properly detected

Problem:    .raml files not properly detected.
Solution:   Recognize .raml as raml instead of yaml. (closes #3594)

runtime/filetype.vim

@@ -1893,8 +1893,11 @@ au BufNewFile,BufRead *.yy,*.yxx,*.y++		setf yacc
 " Yacc or racc
 au BufNewFile,BufRead *.y			call dist#ft#FTy()
 
-" Yaml or Raml
+" Yaml
-au BufNewFile,BufRead *.yaml,*.yml,*.raml	setf yaml
+au BufNewFile,BufRead *.yaml,*.yml		setf yaml
+
+" Raml
+au BufNewFile,BufRead *.raml			setf raml
 
 " yum conf (close enough to dosini)
 au BufNewFile,BufRead */etc/yum.conf		setf dosini

src/testdir/test_filetype.vim

@@ -495,6 +495,7 @@ let s:filename_checks = {
     \ 'xslt': ['file.xsl', 'file.xslt'],
     \ 'yacc': ['file.yy', 'file.yxx', 'file.y++'],
     \ 'yaml': ['file.yaml', 'file.yml'],
+    \ 'raml': ['file.raml'],
     \ 'z8a': ['file.z8a'],
     \ 'zimbu': ['file.zu'],
     \ 'zimbutempl': ['file.zut'],

src/version.c

@@ -792,6 +792,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    507,
 /**/
     506,
 /**/