uim: Fix build with libtool 2.4.7

Delete old m4 macros, so autoreconf can repopulate it.

Fixes

libtool: Version mismatch error.  This is libtool 2.4.7, but the
libtool: definition of this LT_INIT comes from libtool 2.4.6.
libtool: You should recreate aclocal.m4 with macros from libtool 2.4.7
libtool: and run autoconf again.

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-support/uim/uim_1.8.8.bb

@@ -51,6 +51,9 @@ PARALLEL_MAKE = ""
 
 #Because m4 file's find maxdepth=2, so copy the m4 files of the deep depth.
 do_configure:prepend () {
+    rm -rf ${S}/m4.generated/lt*.m4 ${S}/m4.generated/libtool.m4
+    rm -rf ${S}/sigscheme/libgcroots/m4/lt*.m4 ${S}/sigscheme/libgcroots/m4/libtool.m4
+    rm -rf ${S}/sigscheme/m4/lt*.m4 ${S}/sigscheme/m4/libtool.m4
     cp ${S}/sigscheme/m4/* ${S}/m4/
 }