gas macro arguments or escapes botched, perhaps related to ONLY_STANDARD_ESCAPES

[Hans-Peter Nilsson]

Targets that define ONLY_STANDARD_ESCAPES find themselves
failing the gas test "strings" in
gas/testsuite/gas/macros/macros.exp.  The only target in CVS
that does this is currently avr, which might explain why the
failure slipped through everyones extensive testsuite runs.

This happened sometime during the last (two?) weeks.

gas.log snippet for avr-elf:
../as-new   -o dump.o /home/hp/binutils/cvs_write/src/gas/testsuite/gas/macros/strings.s
/home/hp/binutils/cvs_write/src/gas/testsuite/gas/macros/strings.s: Assembler messages:
/home/hp/binutils/cvs_write/src/gas/testsuite/gas/macros/strings.s:0: Warning: Unknown escape '\a' in string: Ignored
FAIL: strings

I'll probably eventually get around to analyze it more
thoroughly and perhaps fix it, but why wait.  The bug might even
be a invalid testcase for all I know right now.

brgds, H-P