libsysprof-capture: Move autocleanup definitions to libsysprof

In preparation for dropping the GLib dependency from libsysprof-capture,
move the autocleanup definitions up to libsysprof. Add a new header for
them.

This is slightly awkward in the tools, which depend on
libsysprof-capture but not libsysprof. Rather than make them depend on
libsysprof (which might be disabled at configure time), include the
`sysprof-capture-autocleanups.h` file between source directories.
`SYSPROF_COMPILATION` needs to be defined for this to work.

Signed-off-by: Philip Withnall <withnall@endlessm.com>

Helps: #40

src/tools/list-threads.c

@@ -24,6 +24,8 @@
 #include <sysprof-capture.h>
 #include <unistd.h>
 
+#include "../libsysprof/sysprof-capture-autocleanups.h"
+
 static gboolean
 foreach_cb (const SysprofCaptureFrame *frame,
             gpointer                   user_data)

src/tools/meson.build

@@ -3,10 +3,13 @@ tools_deps = [
   libsysprof_capture_dep,
 ]
 
+tools_cflags = [ '-DSYSPROF_COMPILATION ']
+
 if get_option('libsysprof') and host_machine.system() == 'linux'
   polkit_agent_dep = dependency('polkit-agent-1')
   sysprof_cli = executable('sysprof-cli', 'sysprof-cli.c',
     dependencies: tools_deps + [libsysprof_dep, polkit_dep, polkit_agent_dep],
+          c_args: tools_cflags,
      install_dir: get_option('bindir'),
          install: true,
   )
@@ -14,21 +17,25 @@ endif
 
 sysprof_cat = executable('sysprof-cat', 'sysprof-cat.c',
   dependencies: tools_deps,
+        c_args: tools_cflags,
        install: false,
 )
 
 sysprof_dump = executable('sysprof-dump', 'sysprof-dump.c',
   dependencies: tools_deps,
+        c_args: tools_cflags,
        install: false,
 )
 
 sysprof_profiler_ctl = executable('sysprof-profiler-ctl',
   [ 'sysprof-profiler-ctl.c', ipc_profiler_src ],
   dependencies: [ tools_deps, gio_unix_dep ],
+        c_args: tools_cflags,
        install: false,
 )
 
 list_threads = executable('list-threads', ['list-threads.c'],
   dependencies: [ tools_deps ],
+        c_args: tools_cflags,
        install: false,
 )

src/tools/sysprof-cat.c

@@ -29,6 +29,7 @@
 #include <sysprof-capture.h>
 #include <unistd.h>
 
+#include "../libsysprof/sysprof-capture-autocleanups.h"
 #include "sysprof-capture-util-private.h"
 
 gint