dracut-early-kdump: explicitly use bash

Currently dracut-early-kdump.sh claims to be POSIX compliant but it
sources kdump-lib.sh which uses bash-only syntax. Thus require bash for
dracut-early-kdump.sh as well.

Signed-off-by: Philipp Rudo <prudo@redhat.com>
Reviewed-by: Coiby Xu <coxu@redhat.com>

.editorconfig

@@ -22,7 +22,7 @@ space_redirects    = true
 shell_variant = bash
 
 # Use dracut code style for *-module-setup.sh
-[*-module-setup.sh]
+[*-module-setup.sh,dracut-early-kdump.sh]
 shell_variant = bash
 indent_style = space
 indent_size = 4

dracut-early-kdump.sh

@@ -1,4 +1,4 @@
-#! /bin/sh
+#! /bin/bash
 
 KEXEC=/sbin/kexec
 standard_kexec_args="-p"