automake: simplify perl location forcing logic

Instead of letting configure find the host's perl and then use a complicated sed
to replace it at install time, simply pre-seed the configure logic with the path
we want to use.

(From OE-Core rev: 84a3978653a322583d413d795567fa431ac7c952)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/automake/automake_1.15.bb

@@ -25,18 +25,10 @@ SRC_URI += " file://python-libdir.patch \
 SRC_URI[md5sum] = "716946a105ca228ab545fc37a70df3a3"
 SRC_URI[sha256sum] = "7946e945a96e28152ba5a6beb0625ca715c6e32ac55f2e353ef54def0c8ed924"
 
+CACHED_CONFIGUREVARS += "ac_cv_path_PERL=${USRBINPATH}/perl"
+
 do_install_append () {
     install -d ${D}${datadir}
-
-    # Some distros have both /bin/perl and /usr/bin/perl, but we set perl location
-    # for target as /usr/bin/perl, so fix it to /usr/bin/perl.
-    for i in aclocal aclocal-${NAMEVER} automake automake-${NAMEVER}; do
-        if [ -f ${D}${bindir}/$i ]; then
-            sed -i -e '1s,#!.*perl,#! ${USRBINPATH}/perl,' \
-            -e 's,exec .*/bin/perl \(.*\) exec .*/bin/perl \(.*\),exec ${USRBINPATH}/perl \1 exec ${USRBINPATH}/perl \2,' \
-            ${D}${bindir}/$i
-        fi
-    done
 }
 
 BBCLASSEXTEND = "native nativesdk"