[libgweather] build: Bump soname for API changes

[Bastien Nocera <hadess src gnome org>]

commit 659e9c9e12c774be3654bbf56db04f59046382d6
Author: Bastien Nocera <hadess hadess net>
Date:   Thu Dec 7 01:22:22 2017 +0100

    build: Bump soname for API changes
    
    One function changed signature (commit 7e9d27c), 2 functions got removed
    (commit ac2a3075).
    
    https://bugzilla.gnome.org/show_bug.cgi?id=791313

 meson.build |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/meson.build b/meson.build
index 14dd370..c6e3213 100644
--- a/meson.build
+++ b/meson.build
@@ -13,9 +13,9 @@ libgweather_version = meson.project_version().split('.')
 # b) If interfaces have been changed or added, but binary compatibility has
 #    been preserved, change to C+1:0:A+1
 # c) If the interface is the same as the previous version, change to C:R+1:A
-libgweather_lt_c=14
+libgweather_lt_c=15
 libgweather_lt_r=0
-libgweather_lt_a=8
+libgweather_lt_a=0
 
 # convert to soname
 libgweather_so_version = '@0@.@1@.@2@'.format((libgweather_lt_c - libgweather_lt_a),