Add backtrace test

Issue genodelabs#304

run/backtrace.run

@@ -0,0 +1,66 @@
+build "core init timer test/backtrace"
+
+create_boot_directory
+
+install_config {
+<config>
+	<parent-provides>
+		<service name="ROM"/>
+		<service name="IRQ"/>
+		<service name="IO_MEM"/>
+		<service name="IO_PORT"/>
+		<service name="PD"/>
+		<service name="RM"/>
+		<service name="CPU"/>
+		<service name="LOG"/>
+	</parent-provides>
+	<default-route>
+		<any-service> <parent/> <any-child/> </any-service>
+	</default-route>
+	<default caps="200"/>
+	<start name="timer">
+		<resource name="RAM" quantum="1M"/>
+		<provides> <service name="Timer"/> </provides>
+	</start>
+	<start name="test-backtrace">
+		<resource name="RAM" quantum="16M"/>
+		<config>
+			<vfs>
+				<dir name="dev">
+					<log/>
+					<inline name="rtc">2019-08-20 15:01</inline>
+				</dir>
+				<dir name="proc">
+					<dir name="self">
+						<rom name="exe"/>
+					</dir>
+				</dir>
+				<rom name="binary"/>
+				<rom name="ld.lib.so"/>
+				<rom name="libc.lib.so"/>
+				<rom name="libm.lib.so"/>
+				<rom name="posix.lib.so"/>
+				<rom name="vfs.lib.so"/>
+			</vfs>
+			<libc stdout="/dev/log" stderr="/dev/log" rtc="/dev/rtc"/>
+		</config>
+		<route>
+			<service name="ROM" label="exe"><parent label="test-backtrace.debug"/></service>
+			<service name="ROM" label="binary"><parent label="test-backtrace.debug"/></service>
+			<any-service><parent/><any-child/></any-service>
+		</route>
+	</start>
+</config>
+}
+
+exec ln -sf ../debug/test-backtrace bin/test-backtrace.debug
+
+build_boot_image {
+	core init timer test-backtrace
+	ld.lib.so libc.lib.so vfs.lib.so libm.lib.so posix.lib.so
+	test-backtrace.debug
+}
+
+append qemu_args " -nographic  "
+
+run_genode_until "child .* exited with exit value 0.*\n" 30

src/test/backtrace/main.cc

@@ -0,0 +1,24 @@
+/*
+ * \brief  libbacktrace test
+ * \author Christian Prochaska
+ * \date   2023-01-28
+ */
+
+/*
+ * Copyright (C) 2023 Genode Labs GmbH
+ *
+ * This file is part of the Genode OS framework, which is distributed
+ * under the terms of the GNU Affero General Public License version 3.
+ */
+
+#include <backtrace.h>
+
+int main(int argc, char **argv)
+{
+	struct backtrace_state *state =
+		backtrace_create_state(NULL, 0, NULL, NULL);
+
+	backtrace_print(state, 0, stdout);
+
+	return 0;
+}

src/test/backtrace/target.mk

@@ -0,0 +1,5 @@
+TARGET   = test-backtrace
+SRC_CC   = main.cc
+LIBS     = posix backtrace
+
+CC_CXX_WARN_STRICT =