uwrap: Fix getresgid wrapping typo

This was making e.g. p11-kit crash on getresgid() call.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>

diff --git a/src/uid_wrapper.c b/src/uid_wrapper.c
index f04642a..2e2c9e6 100644
--- a/src/uid_wrapper.c
+++ b/src/uid_wrapper.c
@@ -623,7 +623,7 @@ static int libc_setresgid(gid_t rgid, gid_t egid, gid_t sgid)
 #ifdef HAVE_GETRESGID
 static int libc_getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid)
 {
-	uwrap_bind_symbol_libc(setresgid);
+	uwrap_bind_symbol_libc(getresgid);
 
 	return uwrap.libc.symbols._libc_getresgid.f(rgid, egid, sgid);
 }