Add initial Meson build system, no install target yet.

meson.build

@@ -0,0 +1,18 @@
+project('steamcompmgr', ['c','cpp'])
+
+dep_x11 = dependency('x11')
+dep_xdamage = dependency('xdamage')
+dep_xcomposite = dependency('xcomposite')
+dep_xrender = dependency('xrender')
+dep_xext = dependency('xext')
+dep_gl = dependency('GL')
+dep_xxf86vm = dependency('xxf86vm')
+
+executable(
+    'steamcompmgr',
+    'src/steamcompmgr.c',
+    dependencies : [
+        dep_x11, dep_xdamage, dep_xcomposite, dep_xrender, dep_xext, dep_gl,
+        dep_xxf86vm
+    ],
+)