For PR876:
Fix problem noticed by Kenneth Hoste. The wrong name for a variable was
being set and subsequently uses of the correct name were empty.

llvm-svn: 29681
diff --git a/llvm/autoconf/m4/find_std_program.m4 b/llvm/autoconf/m4/find_std_program.m4
index 3cb8540..05d3bf77c 100644
--- a/llvm/autoconf/m4/find_std_program.m4
+++ b/llvm/autoconf/m4/find_std_program.m4
@@ -51,7 +51,7 @@
 eval pfxval=\$\{$1pfxdir\}
 eval binval=\$\{$1bindir\}
 eval incval=\$\{$1incdir\}
-eval libvar=\$\{$1libdir\}
+eval libval=\$\{$1libdir\}
 if test "${pfxval}" != "nada" ; then
   CHECK_STD_PROGRAM(${pfxval},$1,$2,$3)
 elif test "${binval}" != "nada" ; then