UBUNTU: [Debian] Don't depend on initramfs-tools

BugLink: http://bugs.launchpad.net/bugs/1700972

Allow images to be created without the need of an initrd and also allow
users to run without an initrd if they want to.
Signed-off-by: Marcelo Henrique Cerri <marcelo.cerri@canonical.com>
Acked-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>

debian.master/control.d/flavour-control.stub

@@ -27,8 +27,8 @@ Architecture: ARCH
 Section: kernel
 Priority: optional
 Provides: linux-image, fuse-module, =PROVIDES=${linux:rprovides}
-Depends: ${misc:Depends}, ${shlibs:Depends}, initramfs-tools | linux-initramfs-tool, kmod
-Recommends: BOOTLOADER
+Depends: ${misc:Depends}, ${shlibs:Depends}, kmod
+Recommends: BOOTLOADER, initramfs-tools | linux-initramfs-tool
 Suggests: fdutils, SRCPKGNAME-doc-PKGVER | SRCPKGNAME-source-PKGVER, SRCPKGNAME-tools, linux-headers-PKGVER-ABINUM-FLAVOUR
 Description: Linux kernel image for version PKGVER on DESC
  This package contains the Linux kernel image for version PKGVER on

debian/control-scripts/postinst

@@ -142,7 +142,7 @@ if (-r "$CONF_LOC" && -f "$CONF_LOC"  ) {
   }
 }
 
-
+$initrd = '' if (! -x "$ramdisk");
 
 # For some versions of kernel-package, we had this warning in the
 # postinst, but the rules did not really interpolate the value in.

debian/control-scripts/postrm

@@ -156,6 +156,8 @@ if (-r "$CONF_LOC" && -f "$CONF_LOC"  ) {
   }
 }
 
+$initrd = '' if (! -x "$ramdisk");
+
 if ($link_in_boot) {
   $image_dest = "/$image_dir/";
   $image_dest =~ s|^/*|/|o;

debian/control-scripts/preinst

@@ -161,6 +161,8 @@ if (-r "$CONF_LOC" && -f "$CONF_LOC"  ) {
   }
 }
 
+$initrd = '' if (! -x "$ramdisk");
+
 $ENV{KERNEL_ARCH}=$kernel_arch if $kernel_arch;
 
 # About to upgrade this package from version $2 TO THIS VERSION.

debian/control-scripts/prerm

@@ -163,6 +163,7 @@ if (-r "$CONF_LOC" && -f "$CONF_LOC"  ) {
   }
 }
 
+$initrd = '' if (! -x "$ramdisk");
 
 $ENV{KERNEL_ARCH}=$kernel_arch if $kernel_arch;