Disable -Wcast-align which causes problems with gtk-doc scanner on arm7

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

libvirt-glib-4.0.0-cast-align.patch

@@ -0,0 +1,11 @@
+diff -rup libvirt-glib-4.0.0.orig/meson.build libvirt-glib-4.0.0.new/meson.build
+--- libvirt-glib-4.0.0.orig/meson.build	2021-02-15 12:23:04.609036200 +0000
++++ libvirt-glib-4.0.0.new/meson.build	2021-02-15 14:39:27.150071607 +0000
+@@ -175,7 +175,6 @@ cc_flags += [
+   '-Wbuiltin-declaration-mismatch',
+   '-Wbuiltin-macro-redefined',
+   '-Wcannot-profile',
+-  '-Wcast-align',
+   '-Wcast-align=strict',
+   '-Wcast-function-type',
+   '-Wchar-subscripts',

libvirt-glib.spec

@@ -7,6 +7,7 @@ Summary: libvirt glib integration for events
 License: LGPLv2+
 URL: https://libvirt.org/
 Source0: https://libvirt.org/sources/glib/%{name}-%{version}.tar.xz
+Patch1: %{name}-%{version}-cast-align.patch
 
 BuildRequires: meson
 BuildRequires: glib2-devel
@@ -64,6 +65,7 @@ managing virtualization host objects
 
 %prep
 %setup -q
+%patch1 -p1
 
 %build
 %meson -Drpath=disabled