CI: print OS and CPU info

Author: fleroviux

.github/workflows/build.yml

@@ -76,6 +76,7 @@ jobs:
           python3 -m pip install Jinja2
       - name: Build NanoBoyAdvance
         run: |
+          uname
           cmake -Bbuild \
             -DCMAKE_CXX_FLAGS="-s" \
             -DUSE_STATIC_SDL=ON \
@@ -119,6 +120,7 @@ jobs:
           python3 -m pip install Jinja2
       - name: Build NanoBoyAdvance
         run: |
+          uname
           cmake -Bbuild \
             -DCMAKE_CXX_FLAGS="-s" \
             -DUSE_STATIC_SDL=ON \