meson: infrastructure for building emulators

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

scripts/create_config

@@ -1,5 +1,7 @@
 #!/bin/sh
 
+test $# -gt 0 && exec < $1
+
 echo "/* Automatically generated by create_config - do not modify */"
 
 while read line; do

scripts/grepy.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+grep -h '=y$' "$@" | sort -u