modules/lvm2: define /run relative paths (not sure why circleci remote docker default run dir != local run dir)

[tlaurion]

This fixes #1857

Was artifact of lvm2 version bump that happened under #1541.
TODO: figure out what still bled here to cause discrepancy, will attach diffoscope logs to #1857

[tlaurion]

Local build for output for 1a07bf7 (note that this hash is last part of rom name):

"/home/user/heads/build/x86/coreboot-24.02.01/qemu-coreboot-fbwhiptail-tpm2-hotp/cbfstool" "/home/user/heads/build/x86/coreboot-24.02.01/qemu-coreboot-fbwhiptail-tpm2-hotp/coreboot.rom" print
FMAP REGION: COREBOOT
Name                           Offset     Type           Size   Comp
cbfs_master_header             0x0        cbfs header        32 none
fallback/romstage              0x80       stage           24464 none
fallback/ramstage              0x60c0     stage          105534 LZMA (226780 decompressed)
build_info                     0x1fd80    raw               108 none
bootsplash.jpg                 0x1fe40    bootsplash      43282 none
fallback/dsdt.aml              0x2a780    raw              7175 none
cmos_layout.bin                0x2c3c0    cmos_layout       640 none
fallback/postcar               0x2c680    stage           28380 none
fallback/payload               0x335c0    simple elf   10363968 none
(empty)                        0xa15a40   null          6051812 none
bootblock                      0xfdb240   bootblock       19328 none
2024-11-22 16:45:00+00:00 INSTALL   build/x86/coreboot-24.02.01/qemu-coreboot-fbwhiptail-tpm2-hotp/coreboot.rom => build/x86/qemu-coreboot-fbwhiptail-tpm2-hotp/heads-qemu-coreboot-fbwhiptail-tpm2-hotp-v0.2.0-2436-g1a07bf7.rom
2a73d1dc92f73fd88d1fca4cccb0d6ce389bca59e5f95198870655764e342756  build/x86/qemu-coreboot-fbwhiptail-tpm2-hotp/heads-qemu-coreboot-fbwhiptail-tpm2-hotp-v0.2.0-2436-g1a07bf7.rom
16777216:build/x86/qemu-coreboot-fbwhiptail-tpm2-hotp/heads-qemu-coreboot-fbwhiptail-tpm2-hotp-v0.2.0-2436-g1a07bf7.rom
rm -rf "/home/user/heads/build/x86/qemu-coreboot-fbwhiptail-tpm2-hotp/update_pkg"
mkdir -p "/home/user/heads/build/x86/qemu-coreboot-fbwhiptail-tpm2-hotp/update_pkg"
cp "/home/user/heads/build/x86/qemu-coreboot-fbwhiptail-tpm2-hotp/heads-qemu-coreboot-fbwhiptail-tpm2-hotp-v0.2.0-2436-g1a07bf7.rom" "/home/user/heads/build/x86/qemu-coreboot-fbwhiptail-tpm2-hotp/update_pkg/"
cd "/home/user/heads/build/x86/qemu-coreboot-fbwhiptail-tpm2-hotp/update_pkg" && sha256sum "heads-qemu-coreboot-fbwhiptail-tpm2-hotp-v0.2.0-2436-g1a07bf7.rom" >sha256sum.txt
cd "/home/user/heads/build/x86/qemu-coreboot-fbwhiptail-tpm2-hotp/update_pkg" && zip -9 "/home/user/heads/build/x86/qemu-coreboot-fbwhiptail-tpm2-hotp/heads-qemu-coreboot-fbwhiptail-tpm2-hotp-v0.2.0-2436-g1a07bf7.zip" "heads-qemu-coreboot-fbwhiptail-tpm2-hotp-v0.2.0-2436-g1a07bf7.rom" sha256sum.txt
 adding: heads-qemu-coreboot-fbwhiptail-tpm2-hotp-v0.2.0-2436-g1a07bf7.rom (deflated 37%)
 adding: sha256sum.txt (deflated 17%)
2a73d1dc92f73fd88d1fca4cccb0d6ce389bca59e5f95198870655764e342756  /home/user/heads/build/x86/qemu-coreboot-fbwhiptail-tpm2-hotp/heads-qemu-coreboot-fbwhiptail-tpm2-hotp-v0.2.0-2436-g1a07bf7.rom
16777216:/home/user/heads/build/x86/qemu-coreboot-fbwhiptail-tpm2-hotp/heads-qemu-coreboot-fbwhiptail-tpm2-hotp-v0.2.0-2436-g1a07bf7.rom

hashes.txt comparison with hashes.txt from that board's CircleCI artifacts from https://app.circleci.com/pipelines/github/tlaurion/heads/3001/workflows/5895e0f1-1b7f-4f71-9789-754e12761491/jobs/58103/artifacts:

user@heads-clean2:~/heads$ wget https://output.circle-artifacts.com/output/job/2f4407cb-c8f1-479c-b04e-d829943c4328/artifacts/0/build/x86/qemu-coreboot-fbwhiptail-tpm2-hotp/hashes.txt -O hashes_1858.txt -q
user@heads-clean2:~/heads$ HASHES1=hashes_1858.txt 
user@heads-clean2:~/heads$ HASHES2=/home/user/heads/build/x86/qemu-coreboot-fbwhiptail-tpm2-hotp/hashes.txt 
user@heads-clean2:~/heads$ egrep '^[0-9a-f]{64}' $HASHES1 | while read line; do HASH_REF=$(echo $line|awk -F " " {'print $1'}); FILE_REF=$(echo $line|awk -F "/" {'print $NF'}); if ! grep -q "$HASH_REF" $HASHES2; then echo "$FILE_REF doesn't match";fi; done

No output =no diff = reproducible.