[pygobject] m4: Update introspection.m4 to current upstream version

[Martin Pitt <martinpitt src gnome org>]

commit 8406b39f4e9ff98e0d59e880dde3ddb5e5131726
Author: Martin Pitt <martinpitt gnome org>
Date:   Tue Nov 6 09:57:00 2012 +0100

    m4: Update introspection.m4 to current upstream version

 m4/introspection.m4 |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/m4/introspection.m4 b/m4/introspection.m4
index 6e2c565..d89c3d9 100644
--- a/m4/introspection.m4
+++ b/m4/introspection.m4
@@ -41,6 +41,8 @@ m4_define([_GOBJECT_INTROSPECTION_CHECK_INTERNAL],
     ],dnl
     [auto],[dnl
         PKG_CHECK_EXISTS([gobject-introspection-1.0 >= $1], found_introspection=yes, found_introspection=no)
+	dnl Canonicalize enable_introspection
+	enable_introspection=$found_introspection
     ],dnl
     [dnl	
         AC_MSG_ERROR([invalid argument passed to --enable-introspection, should be one of @<:@no/auto/yes@:>@])
@@ -61,6 +63,7 @@ m4_define([_GOBJECT_INTROSPECTION_CHECK_INTERNAL],
        INTROSPECTION_TYPELIBDIR="$($PKG_CONFIG --variable=typelibdir gobject-introspection-1.0)"
        INTROSPECTION_CFLAGS=`$PKG_CONFIG --cflags gobject-introspection-1.0`
        INTROSPECTION_LIBS=`$PKG_CONFIG --libs gobject-introspection-1.0`
+       INTROSPECTION_MAKEFILE=`$PKG_CONFIG --variable=datadir gobject-introspection-1.0`/gobject-introspection-1.0/Makefile.introspection
     fi
     AC_SUBST(INTROSPECTION_SCANNER)
     AC_SUBST(INTROSPECTION_COMPILER)
@@ -69,6 +72,7 @@ m4_define([_GOBJECT_INTROSPECTION_CHECK_INTERNAL],
     AC_SUBST(INTROSPECTION_TYPELIBDIR)
     AC_SUBST(INTROSPECTION_CFLAGS)
     AC_SUBST(INTROSPECTION_LIBS)
+    AC_SUBST(INTROSPECTION_MAKEFILE)
 
     AM_CONDITIONAL(HAVE_INTROSPECTION, test "x$found_introspection" = "xyes")
 ])