bug#22826: gnupg test failure

[Danny Milosavljevic]

gnupg fails its tests:

...
note: keeping build directory `/tmp/guix-build-gnupg-2.1.11.drv-0'
builder for `/gnu/store/p91ba6zl4d8gr5ixfqxn8ixhrv13kdv9-gnupg-2.1.11.drv' 
failed with exit code 1
cannot build derivation 
`/gnu/store/ixcbdqm2xvclfnz4d25nv53wnp6x7alh-profile.drv': 1 dependencies 
couldn't be built
cannot build derivation 
`/gnu/store/904rahmy35wrhsfdb26pcfxyirhbmlnk-system.drv': 1 dependencies 
couldn't be built
note: keeping build directory 
`/tmp/guix-build-linux-libre-4.4.3-gnu.tar.xz.drv-0'
guix system: error: build failed: build of 
`/gnu/store/904rahmy35wrhsfdb26pcfxyirhbmlnk-system.drv' failed

More details:

FAIL: gpgtar.test
Test: gpgtar.test
GNUPGHOME=/tmp/guix-build-gnupg-2.1.11.drv-0/gnupg-2.1.11/tests/openpgp
gpgtar: gpg2: gpg: encrypted with 1024-bit ELG key, ID B27907AA, created 
2003-12-31
gpgtar: gpg2:       "Test two (no pp) <address@hidden>"
gpgtar: gpg2: gpg: encrypted with 1024-bit ELG key, ID B27907AA, created 
2003-12-31
gpgtar: gpg2:       "Test two (no pp) <address@hidden>"
gpgtar: gpg2: gpg: encrypted with 1024-bit ELG key, ID B27907AA, created 
2003-12-31
gpgtar: gpg2:       "Test two (no pp) <address@hidden>"
gpgtar: gpg2: gpg: block_filter 0x00000000006edd10: read error 
(size=12276,a->size=12276)
gpgtar: gpg2: gpg: block_filter 0x00000000006ee2e0: read error 
(size=13882,a->size=13882)
gpgtar: gpg2: gpg: WARNING: encrypted message has been manipulated!
gpgtar: gpg2: gpg: block_filter: pending bytes!
gpgtar: gpg2: gpg: block_filter: pending bytes!
gpgtar: error running '../../g10/gpg2': exit status 2