Port to meson

Similar to ports done elsewhere, port this repo to meson.

Change-Id: I8be9f36b55eb52d085958919cd6c853b46b93674
Signed-off-by: Ed Tanous <edtanous@google.com>
diff --git a/meson.build b/meson.build
new file mode 100644
index 0000000..3eca793
--- /dev/null
+++ b/meson.build
@@ -0,0 +1,37 @@
+project(
+  'phosphor-ipmi-bt',
+  'c',
+  version : '1.0',
+  meson_version: '>=1.1.1',
+  default_options: [
+    'b_lto_mode=default',
+    'b_lto_threads=0',
+    'b_lto=true',
+    'b_ndebug=if-release',
+    'warning_level=3',
+    'werror=true',
+  ]
+)
+
+systemd = dependency('systemd')
+libsystemd = dependency('libsystemd')
+systemd_system_unit_dir = systemd.get_variable(
+  pkgconfig: 'systemdsystemunitdir'
+)
+
+executable(
+  'btbridged',
+  'btbridged.c',
+  dependencies: [
+    libsystemd,
+  ],
+  install: true,
+)
+
+configure_file(
+  input: 'btbridged.service',
+  output: 'org.openbmc.HostIpmi.service',
+  install: true,
+  install_dir: systemd_system_unit_dir,
+  copy: true,
+)