Don't fail to install the system on BIOS systems.

debian/changelog

@@ -1,3 +1,9 @@
+calamares-settings-ubuntu (4) UNRELEASED; urgency=medium
+
+  * Don't fail to install the system on BIOS systems.
+
+ -- Simon Quigley <tsimonq2@ubuntu.com>  Mon, 09 Jul 2018 17:51:16 -0500
+
 calamares-settings-ubuntu (3) cosmic; urgency=medium
 
   * Bump Standards-version to 4.1.4, no changes needed.

lubuntu/modules/shellprocess.conf

@@ -2,4 +2,4 @@ dontChroot: true
 timeout: 60
 script:
   - "cp /cdrom/casper/vmlinuz @@ROOT@@/boot/vmlinuz-$(uname -r)"
-  - "[ -d /sys/firmware/efi ] && chroot @@ROOT@@ apt-cdrom add && chroot @@ROOT@@ sed -e '/deb http/ s/^#*/#/' -i /etc/apt/sources.list && chroot @@ROOT@@ apt update && chroot @@ROOT@@ apt -y install grub-efi-amd64-bin && chroot @@ROOT@@ sed -i 's/#deb/deb/' /etc/apt/sources.list"
+  - "[ -d /sys/firmware/efi ] && chroot @@ROOT@@ apt-cdrom add && chroot @@ROOT@@ sed -e '/deb http/ s/^#*/#/' -i /etc/apt/sources.list && chroot @@ROOT@@ apt update && chroot @@ROOT@@ apt -y install grub-efi-amd64-bin && chroot @@ROOT@@ sed -i 's/#deb/deb/' /etc/apt/sources.list || exit 0"