libweston: bump major to 6

At least the following commits break the libweston ABI, strictly speaking:
- a5630eafec
- ce62cb3d05
- 195dadeb2a
- c18ffd3939
- ea54c2fda6
- 27d7c395c7
- acff29b3b3
- 676296749a
- c9c247730b
- 65e1be1234

Furhtermore, 64fbd0f41f break the weston
executable exported ABI.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>

configure.ac

@@ -3,9 +3,9 @@ m4_define([weston_minor_version], [0])
 m4_define([weston_micro_version], [90])
 m4_define([weston_version],
           [weston_major_version.weston_minor_version.weston_micro_version])
-m4_define([libweston_major_version], [5])
+m4_define([libweston_major_version], [6])
 m4_define([libweston_minor_version], [0])
-m4_define([libweston_patch_version], [90])
+m4_define([libweston_patch_version], [0])
 
 AC_PREREQ([2.64])
 AC_INIT([weston],

meson.build

@@ -10,7 +10,7 @@ project('weston',
 	license: 'MIT/Expat',
 )
 
-libweston_major = 5
+libweston_major = 6
 
 # libweston_revision is manufactured to follow the autotools build's
 # library file naming, thanks to libtool