libtool: remove /absolute/path/to/host references

Removed all instances of -fdebug-prefix-map in LTCFLAGS
declaration because they contain references to host system
and are not needed.

/absolute/path/to/host/dd was replaced with 'dd' in
lt_truncate_bin declaration.

Please take note that the location of regex is important
for DEBUG_PREFIX_MAP. Removal of DEBUG_PREFIX_MAP has to be
done before other regex command modify its option value.

Both are modified because they affect binary reproducibility.

[YOCTO #11656]

(From OE-Core rev: 04db02138e363898e040e33557f1296e8a43c3fd)

Signed-off-by: Ooi Cinly <cinly.ooi@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/libtool/libtool_2.4.6.bb

@@ -15,6 +15,7 @@ ACLOCALEXTRAPATH_class-target = ""
 
 do_install_append () {
         sed -e 's@--sysroot=${STAGING_DIR_HOST}@@g' \
+            -e "s@${DEBUG_PREFIX_MAP}@@g" \
             -e 's@${STAGING_DIR_HOST}@@g' \
             -e 's@${STAGING_DIR_NATIVE}@@g' \
             -e 's@^\(sys_lib_search_path_spec="\).*@\1${libdir} ${base_libdir}"@' \
@@ -22,5 +23,6 @@ do_install_append () {
             -e 's@^\(compiler_lib_search_path="\).*@\1${libdir} ${base_libdir}"@' \
             -e 's@^\(predep_objects="\).*@\1"@' \
             -e 's@^\(postdep_objects="\).*@\1"@' \
+            -e "s@${HOSTTOOLS_DIR}/@@g" \
             -i ${D}${bindir}/libtool
 }