Build dynamic versions of musl, curl, openssl, zlib, libgcc & guile

This is required for the Guix bootstrap to work.

steps/gcc-13.3.0/pass1.sh

@@ -204,7 +204,6 @@ src_configure() {
     mkdir build
     cd build
 
-    LDFLAGS="-static" \
     ../configure \
         --prefix="${PREFIX}" \
         --libdir="${LIBDIR}" \
@@ -212,7 +211,6 @@ src_configure() {
         --target="${TARGET}" \
         --host="${TARGET}" \
         --enable-bootstrap \
-        --enable-static \
         --disable-plugins \
         --disable-libssp \
         --disable-libsanitizer \
@@ -224,5 +222,5 @@ src_configure() {
 }
 
 src_compile() {
-    make "${MAKEJOBS}" BOOT_LDFLAGS="-static"
+    make "${MAKEJOBS}"
 }