build: remove m4/as-compiler-flag.m4

no longer used since b2fd4f54883cd701a0c280655c93e20b04897ed2
[WIP] Add a tool fixing GTK-Doc comment blocks in .c and .h files

Just a standalone script for now, should probably eventually
go into g-ir-doctool or g-ir-annotation-tool...
[WIP] giscanner: include linemarkers in "gir/[gio|glib|gobject]-2.0.c"

Makes it obvious where a GTK-Doc comment block was picked up.

Note that these are not C pre-processor style linemarkers on
purpose to prevent g-ir-scanner's SourceScanner() from tripping
up over the non-absolute paths in the generated
"gir/[gio|glib|gobject]-2.0.c" files.
[wip]: gir xml schema

reset && time find /home/dieterv/gnome.org/checkout/gobject-introspection/gir/ /home/dieterv/gnome.org/prefix/share/gir-1.0/  -name "*.gir" -exec xmllint --noout --nonet --schema /home/dieterv/gnome.org/checkout/gobject-introspection/giscanner/gir/gir.xsd '{}' \;
[WIP] docs: improve layout
!!! for testing only !!!