Restore Binutils gprof tool

Binutils 2.36 made PIE mandatory, breaking gprof for all configurations,
so it was removed in c6ae174. GCC 12 made PIE optional again, which
allows gprof to operate when linked with -no-pie. Closes #109.

Author: skeeto

Dockerfile

@@ -174,7 +174,7 @@ RUN /binutils-$BINUTILS_VERSION/configure \
         LDFLAGS="-s" \
  && make MAKEINFO=true -j$(nproc) \
  && make MAKEINFO=true install \
- && rm $PREFIX/bin/elfedit.exe $PREFIX/bin/gprof.exe $PREFIX/bin/readelf.exe
+ && rm $PREFIX/bin/elfedit.exe $PREFIX/bin/readelf.exe
 
 WORKDIR /gmp
 RUN /gmp-$GMP_VERSION/configure \