[scripts] update do-armemu-test to create a default block device file if it doesn't already exist
[scripts] update do-armemu-test to create a default block device file if it doesn't already exist

detule/lk-g2-spr,zhuotong/mi2_lk_NoEmmc,Blefish/android_bootable_bootloader_lk,jbott/lk_gee,CanarySolutions/little-kernel,Blefish/android_bootable_bootloader_lk,oubeichen/lk-v500,M1cha/android_bootable_bootloader_lk,idor/dk50-bootable_bootloader_lk,Foxda-Tech/argo8-bootable-bootloader-lk,RonGokhale/android_lk_bootloader,zhuotong/mi2_lk_NoEmmc,M1cha/mi2_lk,detule/lk-g2-spr,RonGokhale/android_lk_bootloader,M1cha/mi2_lk,utilite2/lk,t2m-foxfone/android_kernel_lk,thornbirdblue/codeaurora_lk,Foxda-Tech/polaris-bootable-bootloader-lk,t2m-foxfone/android_kernel_lk,lg-devs/g2-bootloader,mozilla-b2g/kernel_lk,my4ndr0id/android_bootable_bootloader_lk,M1cha/mi2_lk,Foxda-Tech/argo8-bootable-bootloader-lk,jsr-d10/android_bootable_bootloader_lk,zhuotong/mi2_lk_NoEmmc,hanjae/lumiab0,mozilla-b2g/fairphone2_kernel_lk,efidroid/lk,jbott/lk_gee,Redmi-dev/android_bootable_lk,jcsullins/moboot,RonGokhale/android_lk_bootloader,detule/lk-g2-spr,jbott/lk_gee,detule/lk-g2-spr,utilite2/lk,hanjae/lumiab0,Blefish/android_bootable_bootloader_lk,my4ndr0id/android_bootable_bootloader_lk,Redmi-dev/android_bootable_lk,idor/dk50-bootable_bootloader_lk,pichina/lk,idor/dk50-bootable_bootloader_lk,efidroid/lk,Foxda-Tech/argo8-bootable-bootloader-lk,mozilla-b2g/kernel_lk,pichina/lk,Foxda-Tech/argo8-bootable-bootloader-lk,M1cha/lktris,Foxda-Tech/argo8-bootable-bootloader-lk,efidroid/lk,DooMLoRD/android_bootable_bootloader_lk,chirayudesai/android_bootable_bootloader_lk,xndcn/moboot-for-veer,oubeichen/lk-v500,zhuotong/mi2_lk_NoEmmc,beidl/lk_umia,lg-devs/g2-bootloader,Blefish/android_bootable_bootloader_lk,MiCode/mi2_lk,CanarySolutions/little-kernel,CanarySolutions/little-kernel,beidl/lk_umia,M1cha/android_bootable_bootloader_lk,mozilla-b2g/fairphone2_kernel_lk,jcsullins/moboot,mozilla-b2g/fairphone2_kernel_lk,mozilla-b2g/kernel_lk,jsr-d9/android_kernel_lk,thornbirdblue/codeaurora_lk,jsr-d10/android_bootable_bootloader_lk,jsr-d10/android_bootable_bootloader_lk,jcsullins/moboot,oubeichen/lk-v500,chirayudesai/android_bootable_bootloader_lk,beidl/lk_umia,zhuotong/mi2_lk_NoEmmc,t2m-foxfone/kernel_lk,xndcn/moboot-for-veer,DooMLoRD/android_bootable_bootloader_lk,M1cha/android_bootable_bootloader_lk,detule/lk-g2-spr,xndcn/moboot-for-veer,thornbirdblue/codeaurora_lk,DooMLoRD/android_bootable_bootloader_lk,M1cha/android_bootable_bootloader_lk,my4ndr0id/android_bootable_bootloader_lk,MiCode/mi2_lk,pichina/lk,M1cha/lktris,oubeichen/lk-v500,t2m-foxfone/android_kernel_lk,DooMLoRD/android_bootable_bootloader_lk,my4ndr0id/android_bootable_bootloader_lk,mozilla-b2g/fairphone2_kernel_lk,DooMLoRD/android_bootable_bootloader_lk,jbott/lk_gee,jsr-d9/android_kernel_lk,M1cha/android_bootable_bootloader_lk,beidl/lk_umia,M1cha/lktris,pichina/lk,idor/dk50-bootable_bootloader_lk,jcsullins/moboot,mozilla-b2g/kernel_lk,M1cha/mi2_lk,M1cha/lktris,my4ndr0id/android_bootable_bootloader_lk,lg-devs/g2-bootloader,Foxda-Tech/polaris-bootable-bootloader-lk,thornbirdblue/codeaurora_lk,chirayudesai/android_bootable_bootloader_lk,utilite2/lk,xndcn/moboot-for-veer,efidroid/lk,t2m-foxfone/android_kernel_lk,chirayudesai/android_bootable_bootloader_lk,M1cha/mi2_lk,jcsullins/moboot,Redmi-dev/android_bootable_lk,hanjae/lumiab0,jsr-d9/android_kernel_lk,utilite2/lk,CanarySolutions/little-kernel,jsr-d9/android_kernel_lk,Blefish/android_bootable_bootloader_lk,hanjae/lumiab0,Foxda-Tech/polaris-bootable-bootloader-lk,CanarySolutions/little-kernel,thornbirdblue/codeaurora_lk,t2m-foxfone/android_kernel_lk,Redmi-dev/android_bootable_lk,Redmi-dev/android_bootable_lk,t2m-foxfone/kernel_lk,lg-devs/g2-bootloader,xndcn/moboot-for-veer,jbott/lk_gee,jsr-d10/android_bootable_bootloader_lk,efidroid/lk,t2m-foxfone/kernel_lk,MiCode/mi2_lk,RonGokhale/android_lk_bootloader,M1cha/android_bootable_bootloader_lk,Foxda-Tech/polaris-bootable-bootloader-lk,beidl/lk_umia,utilite2/lk,lg-devs/g2-bootloader,chirayudesai/android_bootable_bootloader_lk,idor/dk50-bootable_bootloader_lk,M1cha/lktris,MiCode/mi2_lk,t2m-foxfone/kernel_lk,hanjae/lumiab0,oubeichen/lk-v500,jsr-d10/android_bootable_bootloader_lk,Foxda-Tech/polaris-bootable-bootloader-lk,jcsullins/moboot,mozilla-b2g/fairphone2_kernel_lk,MiCode/mi2_lk,pichina/lk,RonGokhale/android_lk_bootloader,t2m-foxfone/kernel_lk,jsr-d9/android_kernel_lk,mozilla-b2g/kernel_lk