[tools-libelf] Add latest version.

Add libelf 0.8.11, propagate patchset from 0.8.10.

config/tools/libelf.in

@@ -13,6 +13,10 @@ config LIBELF_V_0_8_10
     bool
     prompt "0.8.10"
 
+config LIBELF_V_0_8_11
+    bool
+    prompt "0.8.11"
+
 # CT_INSERT_VERSION_ABOVE
 # Don't remove above line!
 endchoice
@@ -20,5 +24,6 @@ endchoice
 config LIBELF_VERSION
     string
     default "0.8.10" if LIBELF_V_0_8_10
+    default "0.8.11" if LIBELF_V_0_8_11
 # CT_INSERT_VERSION_STRING_ABOVE
 # Don't remove above line!

patches/libelf/0.8.11/100-fix-64-bit-detection.patch

@@ -0,0 +1,24 @@
+diff -dur libelf-0.8.10.orig/configure libelf-0.8.10/configure
+--- libelf-0.8.10.orig/configure	2007-09-07 14:08:06.000000000 +0200
++++ libelf-0.8.10/configure	2008-10-23 22:43:19.000000000 +0200
+@@ -1595,7 +1595,7 @@
+   echo $ac_n "(cached) $ac_c" 1>&6
+ else
+   if test "$cross_compiling" = yes; then
+-  ac_cv_sizeof_long_long=0
++  ac_cv_sizeof_long_long=8
+ else
+   cat > conftest.$ac_ext <<EOF
+ #line 1602 "configure"
+diff -dur libelf-0.8.10.orig/configure.in libelf-0.8.10/configure.in
+--- libelf-0.8.10.orig/configure.in	2007-09-07 14:07:59.000000000 +0200
++++ libelf-0.8.10/configure.in	2008-10-23 22:43:10.000000000 +0200
+@@ -90,7 +90,7 @@
+ AC_CHECK_SIZEOF(short,2)
+ AC_CHECK_SIZEOF(int,4)
+ AC_CHECK_SIZEOF(long,4)
+-AC_CHECK_SIZEOF(long long,0)
++AC_CHECK_SIZEOF(long long,8)
+ # Windows port
+ AC_CHECK_SIZEOF(__int64, 0)
+