[gdb/testsuite] Remove KFAIL from gdb.base/info-macros.exp

[gdb/testsuite] Remove KFAIL from gdb.base/info-macros.exp

When running test-case gdb.base/info-macros.exp, we have:
...
(gdb) KFAIL: gdb.base/info-macros.exp: info macros info-macros.c:42 \
  (PRMS: gdb/NNNN)
...

The described failure mode however:
...
set test "info macros info-macros.c:42"

set r1 ".*define DEF_MACROS"
set r2 ".*define ONE"
setup_kfail "gdb/NNNN" *-*-*
gdb_test "$test" "$r1$r2"
...
does not match the actual output, given that both defines are in fact
printed.

The pattern fails to match because it's missing a trailing ".*".

Fix this by removing the KFAIL and adding the missing trailing ".*".

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-04-28  Tom de Vries  <tdevries@suse.de>

	* gdb.base/info-macros.exp: Remove KFAIL.  Add missing trailing ".*".