Split installed files out of /after into /image.

sysa/musl-1.2.2/musl-1.2.2.sh

@@ -4,11 +4,11 @@
 
 src_configure() {
     CC=gcc ./configure \
-        --host=i386 \
+        --host=i386-unknown-linux-gnu \
         --disable-shared \
-        --prefix=/after \
-        --libdir=/after/lib/musl \
-        --includedir=/after/include/
+        --prefix="${PREFIX}" \
+        --libdir="${PREFIX}/lib/musl" \
+        --includedir="${PREFIX}/include/"
 
     # configure script creates this file
     if test -f /dev/null; then