CI: Exclude external files for CodeQL:

Author: jserv

.github/codeql/codeql-config.yml

@@ -0,0 +1,5 @@
+paths:
+ - 'src'
+paths-ignore:
+ - 'src/mini-gdbstub/**'
+ - 'src/softfloat/**'

.github/workflows/codeql.yml

@@ -1,4 +1,4 @@
-name: "CodeQL"
+name: CodeQL
 
 on:
   push:
@@ -30,6 +30,7 @@ jobs:
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v3
       with:
+         config-file: .github/codeql/codeql-config.yml
         languages: ${{ matrix.language }}
         queries: +security-and-quality