[balsa: 1/2] Use PKG_PROG_PKG_CONFIG for better cross-building

[Peter Bloomfield <peterb src gnome org>]

commit 0683d98f36a0992ead1cf02e03cb412fab71d20d
Author: Daniel Kahn Gillmor <dkg fifthhorseman net>
Date:   Thu Feb 13 14:06:05 2020 -0500

    Use PKG_PROG_PKG_CONFIG for better cross-building
    
    This should resolve the Lintian concern
    autotools-pkg-config-macro-not-cross-compilation-safe.  See
    https://bugs.debian.org/884798 for more details.

 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index 421432dcc..35eedcd54 100644
--- a/configure.ac
+++ b/configure.ac
@@ -159,7 +159,7 @@ AC_CHECK_MEMBERS([struct utsname.domainname],[],[],[[#include<sys/utsname.h>]])
 
 # pkg-config
 #
-AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
+PKG_PROG_PKG_CONFIG
 
 # glib-compile-resources
 #