Allow system cpptoml

meson.build:
When the 'wrap_mode' option is set to 'nodownload' use a system version
of cpptoml. This does not require using git and having a network
connection during build, which is important for Linux packaging
infrastructure.

subprojects/cpptoml.wrap:
Pin revision to last release tag (v0.1.1).

lib/wptoml/*.cpp:
Remove 'include/' prefix from all cpptoml related includes, at is not
required.

Closes #17

lib/wptoml/array.cpp

@@ -10,7 +10,7 @@
 #include <functional>
 
 /* CPPTOML */
-#include <include/cpptoml.h>
+#include <cpptoml.h>
 
 /* TOML */
 #include "private.h"

lib/wptoml/file.cpp

@@ -7,7 +7,7 @@
  */
 
 /* CPPTOML */
-#include <include/cpptoml.h>
+#include <cpptoml.h>
 
 /* TOML */
 #include "private.h"

lib/wptoml/table.cpp

@@ -10,7 +10,7 @@
 #include <functional>
 
 /* CPPTOML */
-#include <include/cpptoml.h>
+#include <cpptoml.h>
 
 /* TOML */
 #include "private.h"

meson.build

@@ -26,9 +26,13 @@ else
   wireplumber_config_dir = join_paths(get_option('prefix'), get_option('sysconfdir'), 'wireplumber')
 endif
 
-cmake = import('cmake')
-cpptoml = cmake.subproject('cpptoml')
-cpptoml_dep = cpptoml.dependency('cpptoml')
+if get_option('wrap_mode') == 'nodownload'
+  cpptoml_dep = dependency('cpptoml')
+else
+  cmake = import('cmake')
+  cpptoml = cmake.subproject('cpptoml')
+  cpptoml_dep = cpptoml.dependency('cpptoml')
+endif
 
 gobject_dep = dependency('gobject-2.0', version : '>= 2.58')
 gmodule_dep = dependency('gmodule-2.0', version : '== ' + gobject_dep.version())

subprojects/cpptoml.wrap

 [wrap-git]
 directory=cpptoml
 url=https://github.com/skystrife/cpptoml.git
-revision=master
+revision=v0.1.1