correct installation of expat_external.h header by replacing defective local install script with shtool(1)

expat/expat.spec

@@ -34,7 +34,7 @@ Class:        BASE
 Group:        Converter
 License:      MIT/X11-style
 Version:      1.95.8
-Release:      20040724
+Release:      20040803
 
 #   list of sources
 Source0:      http://osdn.dl.sourceforge.net/expat/expat-%{version}.tar.gz
@@ -64,6 +64,7 @@ AutoReqProv:  no
 %build
     CC="%{l_cc}" \
     CFLAGS="%{l_cflags -O}" \
+    INSTALL="%{l_shtool} install -c" \
     ./configure \
         --prefix=%{l_prefix} \
         --disable-shared