Added two packages for Dimitri Sabadie.

- smoothie, a spline library ;
- al, a raw binding to OpenAL 1.1.

build-constraints.yaml

@@ -531,7 +531,9 @@ packages:
         - io-manager
 
     "Dimitri Sabadie <dimitri.sabadie@gmail.com":
+        - al
         - monad-journal
+        - smoothie
 
     "Thomas Schilling <nominolo@googlemail.com>":
         - ghc-syb-utils
@@ -643,7 +645,7 @@ packages:
 
     "Samplecount stefan@samplecount.com @kaoskorobase":
         - shake-language-c
-        
+
     "Marcin Mrotek <marcin.jan.mrotek@gmail.com>":
         - diagrams-hsqml
         - type-list