build: Define library private include path

Separate declaration of library internal inclusion path.
This will be used by tests, developed outside of library code, that need to
include parts of the library internal APIs and can re-use the here defined
variable.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

src/libcamera/meson.build

@@ -8,9 +8,11 @@ libcamera_headers = files([
     'include/utils.h',
 ])
 
+libcamera_internal_includes =  include_directories('include')
+
 includes = [
     libcamera_includes,
-    include_directories('include'),
+    libcamera_internal_includes,
 ]
 
 libcamera = shared_library('camera',