Print spec files on all POSIX platforms

Author: gnu-andrew

.github/workflows/submit.yml

@@ -175,7 +175,10 @@ jobs:
         working-directory: jdk
 
       - name: Build
-        run: make CONF_NAME=linux-x64 LOG_LEVEL=debug images
+        run: |
+          cat build/linux-x64/spec.gmk
+          cat build/linux-x64/hotspot-spec.gmk
+          make CONF_NAME=linux-x64 LOG_LEVEL=debug images
         working-directory: jdk
 
       - name: Pack artifacts
@@ -534,7 +537,10 @@ jobs:
         working-directory: jdk
 
       - name: Build
-        run: make CONF_NAME=linux-x86 LOG_LEVEL=debug images
+        run: |
+          cat build/linux-x86/spec.gmk
+          cat build/linux-x86/hotspot-spec.gmk
+          make CONF_NAME=linux-x86 LOG_LEVEL=debug images
         working-directory: jdk
 
       - name: Pack artifacts
@@ -1426,7 +1432,10 @@ jobs:
         working-directory: jdk
 
       - name: Build
-        run: make CONF_NAME=macos-x64 LOG_LEVEL=debug images
+        run: |
+          cat build/macos-x64/spec.gmk
+          cat build/macos-x64/hotspot-spec.gmk
+          make CONF_NAME=macos-x64 LOG_LEVEL=debug images
         working-directory: jdk
 
       - name: Pack artifacts