tests: add .sh and .pl suffixes to shell and perl tests, respectively

Not only this shrinks the size of the generated Makefile (from > 6300
lines to ~3000), but will allow further simplifications in future
changes.

* tests/Makefile.am (TEST_EXTENSIONS): Add '.sh' and '.pl'.
(PL_LOG_COMPILER, SH_LOG_COMPILER): New, still defined simply to
$(LOG_COMPILER) for the time being.
(TESTS, root_tests): Adjust as described.
* All tests: Rename as described.

tests/misc/od-float.sh

@@ -0,0 +1,58 @@
+#!/bin/sh
+# Test od on floating-point values.
+
+# Copyright (C) 2010-2012 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+print_ver_ od
+
+export LC_ALL=C
+
+# Test for a bug in coreutils up through 8.7: od was losing
+# information when asked to parse floating-point values.  The numeric
+# tests are valid only on Intel-like hosts, but that should be good
+# enough to detect regressions, as they are designed to succeed on
+# non-Intel-like hosts.  Also, test for another bug in coreutils 8.7
+# on x86: sometimes there was no space between the columns.
+
+set x $(echo aaaabaaa | tr ab '\376\377' | od -t fF) ||
+  framework_failure_
+case "$*" in
+*0-*) fail=1;;
+esac
+case $3,$4 in
+-1.694740e+38,-1.694740e+38) fail=1;;
+esac
+
+set x $(echo aaaaaaaabaaaaaaa | tr ab '\376\377' | od -t fD) ||
+  framework_failure_
+case "$*" in
+*0-*) fail=1;;
+esac
+case $3,$4 in
+-5.314010372517808e+303,-5.314010372517808e+303) fail=1;;
+esac
+
+set x $(echo aaaaaaaaaaaaaaaabaaaaaaaaaaaaaaa | tr ab '\376\377' | od -t fL) ||
+  framework_failure_
+case "$*" in
+*0-*) fail=1;;
+esac
+case $3,$4 in
+-1.023442870282055988e+4855,-1.023442870282055988e+4855) fail=1;;
+esac
+
+Exit $fail