Fix depcomp being deleted in GCC

On my system, (usually) depcomp is deleted during autoreconf. The
reasons for this are very unclear but appear to be timestamp related.
This seems to fix it.

steps/gcc-10.5.0/pass1.sh

@@ -101,13 +101,12 @@ src_prepare() {
     
     # Regenerate autotools
     # configure
+    touch depcomp
     find . -name configure | sed 's:/configure::' | while read d; do
         pushd "${d}"
         AUTOMAKE=automake-1.15 ACLOCAL=aclocal-1.15 autoreconf-2.69 -fiv
         popd
     done
-    # Because GCC is stupid, copy depcomp back in
-    cp "${PREFIX}/share/automake-1.15/depcomp" .
     # Makefile.in only
     BACK="${PWD}"
     find . -type d \