Update Dockerfile.ghdl

Author: MaDMeuy

Dockerfile.ghdl

@@ -20,7 +20,8 @@ WORKDIR /tmp/ghdl
 RUN ./configure --with-gcc=/tmp/gcc-12.2.0 --prefix=/usr/local --enable-libghdl
 RUN make -j$(nproc)
 
-RUN make libs.vhdl.gcc GHDL=$(pwd)/ghdl
+RUN mkdir -p /usr/local/bin && cp -p ghdl /usr/local/bin/ghdl
+RUN make libs.vhdl.gcc
 RUN make install
 
 # Final Stage