Get rid of [^c][^h][^i][^l][^d] from error regex. It won't match
/home/... and other legitimate paths printed for the program name of
the ld under test.
* testsuite/ld-mmix/bpo-15.d: Fix error regex.
* testsuite/ld-mmix/bpo-15m.d: Likewise.
* testsuite/ld-mmix/bpo-21.d: Likewise.
* testsuite/ld-mmix/bpo-21m.d: Likewise.
#source: bpo-7.s
#as: -linker-allocated-gregs
#ld: -m elf64mmix
-#error: ^[^c][^h][^i][^l][^d].* undefined reference to `areg'$
+#error: ^.* undefined reference to `areg'$
# A BPO against an undefined symbol.
#source: bpo-7.s
#as: -linker-allocated-gregs
#ld: -m mmo
-#error: ^[^c][^h][^i][^l][^d].* undefined reference to `areg'$
+#error: ^.* undefined reference to `areg'$
# A BPO against an undefined symbol.
#source: bpo-7.s
#as: -linker-allocated-gregs
#ld: -m elf64mmix
-#error: ^[^c][^h][^i][^l][^d].* undefined reference to `areg'$
+#error: ^.* undefined reference to `areg'$
# A BPO reloc against an undefined symbol, with a full set of normal
# BPO:s.
#source: bpo-7.s
#as: -linker-allocated-gregs
#ld: -m mmo
-#error: ^[^c][^h][^i][^l][^d].* undefined reference to `areg'$
+#error: ^.*undefined reference to `areg'$
# A BPO reloc against an undefined symbol, with a full set of normal
# BPO:s.