*printf: Detect large precisions bug on Solaris 10/SPARC. * m4/printf.m4 (gl_PRINTF_PRECISION): Add one more test code, provided by Paul Eggert. * tests/test-snprintf-posix.h (test_function): Add this test code here too. * tests/test-sprintf-posix.h (test_function): Likewise. * tests/test-vasnprintf-posix.c (test_function): Likewise. * tests/test-vasprintf-posix.c (test_function): Likewise. * doc/posix-functions/fprintf.texi: Mention Solaris 10 bug as worked around by gnulib. * doc/posix-functions/printf.texi: Likewise. * doc/posix-functions/snprintf.texi: Likewise. * doc/posix-functions/sprintf.texi: Likewise. * doc/posix-functions/vfprintf.texi: Likewise. * doc/posix-functions/vprintf.texi: Likewise. * doc/posix-functions/vsnprintf.texi: Likewise. * doc/posix-functions/vsprintf.texi: Likewise. * doc/posix-functions/dprintf.texi: Undo last commit. * doc/posix-functions/vdprintf.texi: Likewise.