GDB AIX build broken

[David Edelsohn <dje.gcc@gmail.com>]

GDB build on AIX is broken due to a recent commit.

g++ -g -O2   -I. -I/home/dje/src/binutils-gdb/gdb
-I/home/dje/src/binutils-gdb/gdb/common
-I/home/dje/src/binutils-gdb/gdb/config
-DLOCALEDIR="\"/usr/local/share/locale\"" -DHAVE_CONFIG_H
-I/home/dje/src/binutils-gdb/gdb/../include/opcode
-I/home/dje/src/binutils-gdb/gdb/../opcodes/..
-I/home/dje/src/binutils-gdb/gdb/../readline/..
-I/home/dje/src/binutils-gdb/gdb/../zlib -I../bfd
-I/home/dje/src/binutils-gdb/gdb/../bfd
-I/home/dje/src/binutils-gdb/gdb/../include -I../libdecnumber
-I/home/dje/src/binutils-gdb/gdb/../libdecnumber
-I/home/dje/src/binutils-gdb/gdb/gnulib/import -Ibuild-gnulib/import
-DTUI=1  -Wall -Wpointer-arith -Wno-unused -Wunused-value
-Wunused-function -Wno-switch -Wno-char-subscripts -Wempty-body
-Wunused-but-set-parameter -Wunused-but-set-variable -Wno-sign-compare
-Wno-write-strings -Wno-narrowing -Wformat-nonliteral  -c -o buffer.o
-MT buffer.o -MMD -MP -MF .deps/buffer.Tpo
/home/dje/src/binutils-gdb/gdb/common/buffer.c
/home/dje/src/binutils-gdb/gdb/common/buffer.c: In function 'void
buffer_xml_printf(buffer*, const char*, ...)':
/home/dje/src/binutils-gdb/gdb/common/buffer.c:133:27: error: expected
')' before 'PRId64'
         sprintf (str, "%" PRId64,
                           ^~~~~~
/home/dje/src/binutils-gdb/gdb/common/buffer.c:134:43: warning:
spurious trailing '%' in format [-Wformat=]
           (int64_t) va_arg (ap, long long));
                                           ^
/home/dje/src/binutils-gdb/gdb/common/buffer.c:134:43: warning: too
many arguments for format [-Wformat-extra-args]
/home/dje/src/binutils-gdb/gdb/common/buffer.c:137:27: error: expected
')' before 'PRIu64'
         sprintf (str, "%" PRIu64,
                           ^~~~~~
/home/dje/src/binutils-gdb/gdb/common/buffer.c:138:53: warning:
spurious trailing '%' in format [-Wformat=]
           (uint64_t) va_arg (ap, unsigned long long));
                                                     ^
/home/dje/src/binutils-gdb/gdb/common/buffer.c:138:53: warning: too
many arguments for format [-Wformat-extra-args]
/home/dje/src/binutils-gdb/gdb/common/buffer.c:141:27: error: expected
')' before 'PRIx64'
         sprintf (str, "%" PRIx64,
                           ^~~~~~
/home/dje/src/binutils-gdb/gdb/common/buffer.c:142:53: warning:
spurious trailing '%' in format [-Wformat=]
           (uint64_t) va_arg (ap, unsigned long long));
                                                     ^
/home/dje/src/binutils-gdb/gdb/common/buffer.c:142:53: warning: too
many arguments for format [-Wformat-extra-args]
/home/dje/src/binutils-gdb/gdb/common/buffer.c:145:27: error: expected
')' before 'PRIo64'
         sprintf (str, "%" PRIo64,
                           ^~~~~~
/home/dje/src/binutils-gdb/gdb/common/buffer.c:146:53: warning:
spurious trailing '%' in format [-Wformat=]
           (uint64_t) va_arg (ap, unsigned long long));
                                                     ^
/home/dje/src/binutils-gdb/gdb/common/buffer.c:146:53: warning: too
many arguments for format [-Wformat-extra-args]

Errors with PRIxxx macros normally mean a problem with header file
inclusion.  for example, gdb/btrace.c, which also uses PRIxxx macros,
builds without error.

- David