libdbi-drivers: import from old packages feed

- rename packages from libdbi-drivers-* to libdbd-*
 - cleanup title & description
 - remove SQLite v2 driver
 - use PKG_INSTALL
 - add a BuildPlugin macro to package drivers
 - add license info
 - add myself as maintainer

Signed-off-by: Nicolas Thill <nico@openwrt.org>

libs/libdbi-drivers/patches/001_libsqlite3_fix.patch

@@ -0,0 +1,11 @@
+--- a/acinclude.m4
++++ b/acinclude.m4
+@@ -310,7 +310,7 @@ if test "$ac_sqlite3" = "yes"; then
+ 		AC_SEARCH_LIBS_VAR([sqlite3_exec], sqlite3, , , , SQLITE3_LIBS)
+ 		SQLITE3_LDFLAGS=""
+ 	else
+-		SQLITE3_LIBS=-lsqlite
++		SQLITE3_LIBS=-lsqlite3
+ 		SQLITE3_LDFLAGS=-L$ac_sqlite3_libdir
+ 	fi
+