ci: compile with master's goalc, but with the PR's changes (#3631)

Mistake lead to CI failures for PRs that modified goal_src (of course
the files are different than master!)

.github/workflows/compiler-output-check.yaml

@@ -43,16 +43,9 @@ jobs:
             -DCMAKE_CXX_COMPILER_LAUNCHER=sccache
 
       - name: Build goalc (master)
-        run: cmake --build build --parallel $((`nproc`)) --target goalc
-
-      - name: Compile and preserve (master)
         run: |
-          ./build/goalc/goalc --game jak1 --cmd "(make-group \"all-code\")"
-          ./build/goalc/goalc --game jak2 --cmd "(make-group \"all-code\")"
-          ./build/goalc/goalc --game jak3 --cmd "(make-group \"all-code\")"
-          mv ./out/jak1/obj ./out/jak1/obj.master
-          mv ./out/jak2/obj ./out/jak2/obj.master
-          mv ./out/jak3/obj ./out/jak3/obj.master
+          cmake --build build --parallel $((`nproc`)) --target goalc
+          mv ./build ./build.master
 
       - name: Checkout PR
         uses: actions/checkout@v4
@@ -71,6 +64,15 @@ jobs:
       - name: Build goalc (PR)
         run: cmake --build build --parallel $((`nproc`)) --target goalc
 
+      - name: Compile and preserve (master)
+        run: |
+          ./build.master/goalc/goalc --game jak1 --cmd "(make-group \"all-code\")"
+          ./build.master/goalc/goalc --game jak2 --cmd "(make-group \"all-code\")"
+          ./build.master/goalc/goalc --game jak3 --cmd "(make-group \"all-code\")"
+          mv ./out/jak1/obj ./out/jak1/obj.master
+          mv ./out/jak2/obj ./out/jak2/obj.master
+          mv ./out/jak3/obj ./out/jak3/obj.master
+
       - name: Compile and preserve (PR)
         run: |
           ./build/goalc/goalc --game jak1 --cmd "(make-group \"all-code\")"

.gitignore

@@ -9,7 +9,8 @@ prof.json
 cmake-build-debug/*
 cmake-build-debug--o0/*
 .idea/*
-build/*
+build/
+build.master/
 /decompiler_out*
 logs/*
 profile_data/*