[gobject-introspection] Use PKG_CONFIG when running g-ir-scanner

[Colin Walters <walters src gnome org>]

commit a62b3020573f9f2a4871c0f74212c8429bc2015e
Author: Nicola Fontana <ntd entidi it>
Date:   Thu Feb 11 12:58:34 2016 +0100

    Use PKG_CONFIG when running g-ir-scanner
    
    While cross-compiling, "$PKG_CONFIG" is not "pkg-config", so do not
    assume it when calling g-ir-scanner to build up the base gir files.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=761983

 Makefile.introspection |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Makefile.introspection b/Makefile.introspection
index cd7bd1b..1812df9 100644
--- a/Makefile.introspection
+++ b/Makefile.introspection
@@ -84,7 +84,7 @@ _gir_silent_compiler = $(_gir_silent_compiler_$(V))
 _gir_silent_compiler_ = $(_gir_silent_compiler_$(_gir_verbosity))
 _gir_silent_compiler_0 = @echo "  GICOMP   $(1)";
 
-_gir_default_scanner_env = CPPFLAGS="$(CPPFLAGS)" CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" CC="$(CC)"
+_gir_default_scanner_env = CPPFLAGS="$(CPPFLAGS)" CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" CC="$(CC)" 
PKG_CONFIG="$(PKG_CONFIG)"
 
 #
 # Creates a GIR by scanning C headers/sources