configure*: Fix wrong quote character in AC_MSG_ERROR

Square brackets are used as quotes in autoconf.

From Section 8.1.1, Active Characters of the Autoconf manual[1]:

> To fully understand where proper quotation is important, you first
> need to know what the special characters are in Autoconf: ‘#’
> introduces a comment inside which no macro expansion is performed, ‘,’
> separates arguments, ‘[’ and ‘]’ are the quotes themselves, ‘(’ and
> ‘)’ (which M4 tries to match by pairs), and finally ‘$’ inside a macro
> definition.

[1] https://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.70/autoconf.html#Active-Characters

1 files changed, 1 insertions, 1 deletions

diff --git a/configure b/configure
index a430d2629..ba553102d 100755
--- a/configure
+++ b/configure
@@ -3643,7 +3643,7 @@ fi
 
 
         if test "x$HAVE_GAWK" != "xyes"; then :
-  as_fn_error $? "\"*** gawk not found ***\"" "$LINENO" 5
+  as_fn_error $? "*** gawk not found ***" "$LINENO" 5
 fi
 
 fi