test: Initial testing framework

Configure with --enable-testtools.

BLD_ROOT is now the top build directory.

Current test requires ttynvt to be started (by root) like
 # BLD_ROOT/src/ttynvt -d -E -S localhost:1234 -n ttyNVT99
Device and server name parameters must be as shown above.

Run tests like
 $ make -C BLD_ROOT test 	# Builds the other programs too
 $ make -C BLD_ROOT/test	# Only running tests
 $ make -C BLD_ROOT/test V=1 RUN_OPTS="--gtest_filter=Test1.t1"

configure.ac

@@ -6,10 +6,10 @@ m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 AC_USE_SYSTEM_EXTENSIONS
 
 AC_PROG_CC
+AC_PROG_CXX
 
 AC_PROG_INSTALL
 
-define([AC_LIBTOOL_LANG_CXX_CONFIG], [:])dnl
 define([AC_LIBTOOL_LANG_F77_CONFIG], [:])dnl
 define([AC_LIBTOOL_LANG_GCJ_CONFIG], [:])dnl
 
@@ -31,6 +31,8 @@ AC_ARG_ENABLE(testtools,
   enable_testtools=no)
 AM_CONDITIONAL([BUILD_TESTTOOLS], [test "x$enable_testtools" = "xyes"])
 
+AM_CONDITIONAL(BUILD_TEST, false)
+
 CFLAGS_WARN="$CFLAGS_WARN -Wall -Wextra -Werror -Wno-unused-parameter"
 CFLAGS_WARN="$CFLAGS_WARN -Wmissing-prototypes -Wmissing-declarations -Wstrict-prototypes"
 CFLAGS_WARN="$CFLAGS_WARN -Waggregate-return -Wpointer-arith -Wshadow -Wwrite-strings"
@@ -44,6 +46,7 @@ lib/Makefile
 src/Makefile
 nvtsrv/Makefile
 nvttest/Makefile
+test/Makefile
 ])
 AC_OUTPUT