fixup! Build and upload artifact on GitHub Actions

Author: antoyo

.github/workflows/main.yml

@@ -37,9 +37,9 @@ jobs:
         ls
         mkdir build install
         cd build
-        ../gcc/configure --enable-host-shared --enable-languages=c,jit,lto --disable-bootstrap --disable-multilib --prefix=$(pwd)/../install/usr --libdir=$(pwd)/../install/usr/lib --libexecdir=$(pwd)/../install/usr/lib
+        ../gcc/configure --enable-host-shared --enable-languages=c,jit,lto --disable-bootstrap --disable-multilib --prefix=/usr
         make -j4
-        make install
+        make install DESTDIR=$(pwd)/../install
 
     - name: Build Debian package
       run: |