build: add libxml2/libbuid for fontconfig dynamic link for CI

build.zig

@@ -718,7 +718,14 @@ fn addDeps(
         step.linkSystemLibrary("pixman-1");
         step.linkSystemLibrary("zlib");
 
-        if (font_backend.hasFontconfig()) step.linkSystemLibrary("fontconfig");
+        if (font_backend.hasFontconfig()) {
+            step.linkSystemLibrary("fontconfig");
+
+            // Required on some systems, and pkg-config for fontconfig
+            // doesn't include it
+            step.linkSystemLibrary("libxml-2.0");
+            step.linkSystemLibrary("uuid");
+        }
     }
 
     // Other dependencies, we may dynamically link

nix/devshell.nix

@@ -30,7 +30,8 @@
 , harfbuzz
 , libpng
 , libGL
-, libuv
+, libuuid
+, libxml2
 , libX11
 , libXcursor
 , libXext
@@ -51,7 +52,8 @@ let
     freetype
     harfbuzz
     libpng
-    libuv
+    libuuid
+    libxml2
     zlib
 
     libX11
@@ -105,7 +107,8 @@ in mkShell rec {
     freetype
     harfbuzz
     libpng
-    libuv
+    libuuid
+    libxml2
     pixman
     zlib