pixman: Changes to '0.30'

[Søren Sandmann Pedersen]

New branch '0.30' available with the following commits:
commit 63004529526db1ba1ba5a95a93522fa0cf385ec5
Author: Alexander Troosh <trush at yandex.ru>
Date:   Tue Jun 11 15:55:34 2013 +0400

    Require GTK+ version >= 2.16
    
    I'm got bug in my system:
    
    lcc: "scale.c", line 374: warning: function "gtk_scale_add_mark" declared
              implicitly [-Wimplicit-function-declaration]
          gtk_scale_add_mark (GTK_SCALE (widget), 0.0, GTK_POS_LEFT, NULL);
          ^
    
      CCLD   scale
    scale.o: In function `app_new':
    (.text+0x23e4): undefined reference to `gtk_scale_add_mark'
    scale.o: In function `app_new':
    (.text+0x250c): undefined reference to `gtk_scale_add_mark'
    scale.o: In function `app_new':
    (.text+0x2634): undefined reference to `gtk_scale_add_mark'
    make[2]: *** [scale] Error 1
    make[2]: Target `all' not remade because of errors.
    
    $ pkg-config --modversion gtk+-2.0
    2.12.1
    
    The demos/scale.c use call to gtk_scale_add_mark() function from 2.16+
    version of GTK+. Need do support old GTK+ (rewrite scale.c) or simple
    demand of high version of GTK+, like this:

commit 02869a1229833a3272355f3d9e1206936b430fa1
Author: Matthieu Herrb <matthieu.herrb at laas.fr>
Date:   Sat Jun 8 18:07:20 2013 +0200

    configure.ac: Don't use '+=' since it's not POSIX
    
    Reviewed-by: Matt Turner <mattst88 at gmail.com>
    Signed-off-by: Matthieu Herrb <matthieu.herrb at laas.fr>

commit 35da06c828049d90975c08655bb9b77184cdab68
Author: Markos Chandras <markos.chandras at imgtec.com>
Date:   Wed May 15 09:51:20 2013 -0700

    Use AC_LINK_IFELSE to check if the Loongson MMI code can link
    
    The Loongson code is compiled with -march=loongson2f to enable the MMI
    instructions, but binutils refuses to link object code compiled with
    different -march settings, leading to link failures later in the
    compile. This avoids that problem by checking if we can link code
    compiled for Loongson.
    
    Reviewed-by: Matt Turner <mattst88 at gmail.com>
    Signed-off-by: Markos Chandras <markos.chandras at imgtec.com>

commit e14f5a739f3ea1a3a6cff9bd5681677f05962314
Author: ingmar at irsoft.de <ingmar at irsoft.de>
Date:   Sat May 11 11:55:04 2013 +0200

    Fix broken build when HAVE_CONFIG_H is undefined, e.g. on Win32.
    
    Build fix for platforms without a generated config.h, for example Win32.