src/woeusb: chk_rt_deps: Fix mkfs.fat detection, fixes #106

This patch fixed two issues:

* `mkfs.msdos` detection is not working due to typo
* `mkfs.vfat` and `mkfs.fat` not detected, which the latter is used by current dosfstools

```
The ./configure script has an option --enable-compat-symlinks that will configure the build to symlink older names of the tools to the current ones on installation. These are dosfsck, fsck.msdos and fsck.vfat for fsck.fat, mkdosfs, mkfs.msdos and mkfs.vfat for mkfs.fat and dosfslabel for fatlabel
```

Reported-by: Jens(schiffsratte) <https://github.com/schiffsratte>
Related-GitHub-Issue: make compatible with dosfstools 4 · Issue #106 · slacka/WoeUSB <https://github.com/slacka/WoeUSB/issues/106>
Signed-off-by: 林博仁 <[email protected]>

src/woeusb

@@ -370,11 +370,15 @@ check_runtime_dependencies(){
 
 	if command -v 'mkdosfs' &> /dev/null; then
 		command_mkdosfs_ref='mkdosfs'
-	elif command -v 'make.msdos' &> /dev/null; then
+	elif command -v 'mkfs.msdos' &> /dev/null; then
 		command_mkdosfs_ref='mkfs.msdos'
+	elif command -v 'mkfs.vfat' &>/dev/null; then
+		command_mkdosfs_ref='mkfs.vfat'
+	elif command -v 'mkfs.fat' &>/dev/null; then
+		command_mkdosfs_ref='mkfs.fat'
 	else
 		echo_with_color red\
-			"${FUNCNAME[0]}: Error: mkdosfs or mkfs.msdos command not found!" >&2
+			"${FUNCNAME[0]}: Error: mkdosfs/mkfs.msdos/mkfs.vfat/mkfs.fat command not found!" >&2
 		echo_with_color red\
 			"${FUNCNAME[0]}: Error: Please make sure that dosfstools is properly installed!" >&2
 		result="failed"