improve overflow diagnostics to show input file for destination symbol

[quic-seaswara]

cat > jal.t << \!
baz = 0xffffffff81090494;
SECTIONS {
. = 0xffffffff812000a0;
foo : { *(.text) }
}
!

cat > jal1.t << \!
SECTIONS {
. = 0xffffffff81090494;
.baz : { *(.baz) }
. = 0xffffffff812000a0;
foo : { *(.text) }
}
!

cat > a.s << \!
.section .baz,"ax",@progbits
.global baz
baz:
nop
!

cat > b.s << \!
.section .text,"ax",@progbits
jal baz
!

clang -c -target riscv64 b.s a.s
ld.eld b.o -T jal.t
ld.eld a.o b.o -T jal1.t

eld emits

Error: b.o:(.text): relocation R_RISCV_JAL out of range: -1506316 is not in [-1048576, 1048575]; references 'baz'
Error: b.o:(.text): relocation R_RISCV_JAL out of range: -1506316 is not in [-1048576, 1048575]; references 'baz'

lld emits

ld.lld: error: b.o:(.text+0x0): relocation R_RISCV_JAL out of range: -1506316 is not in [-1048576, 1048575]; references 'baz'
>>> defined in jal.t:1

$ ld.lld a.o b.o -T jal1.t 
ld.lld: error: b.o:(.text+0x0): relocation R_RISCV_JAL out of range: -1506316 is not in [-1048576, 1048575]; references 'baz'
>>> defined in a.o

eld used to show the input file for the destination symbol and now it does not.