fix(ci): declare fontconfig gperf generator

tools/embedded-mpv/build-linux-runtime.cjs

@@ -427,6 +427,7 @@ const REQUIRED_TOOLS = Object.freeze([
     'cmake',
     'curl',
     'git',
+    'gperf',
     'make',
     'meson',
     'nasm',
@@ -444,6 +445,7 @@ const MINIMUM_TOOL_VERSIONS = Object.freeze({
     cmake: '3.16.0',
     curl: '7.71.0',
     git: '2.30.0',
+    gperf: '3.1.0',
     make: '4.0.0',
     meson: '1.6.0',
     nasm: '2.15.05',