Add texinfo.bbclass; recipes that use texinfo utils at build-time inherit it.

The class itself currently does nothing. The idea is to mark all recipes that
make use of the texinfo utilities. In the future, this class could be used to
suppress the generation/formatting of documentation for performance,
explicitly track dependencies on these utilities, and eliminate Yocto's
current dependency on the host system's texinfo utilities.

(From OE-Core rev: e6fb2f9afe2ba6b676c46d1eb297ca9cc532d405)

Signed-off-by: Max Eliaser <max.eliaser@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/autogen/autogen-native_5.18.2.bb

@@ -17,7 +17,7 @@ SRC_URI[sha256sum] = "cc2702dec21ba5b01144865163f6d1a54268d2b72aafc5520ad0e0cb57
 
 DEPENDS = "guile-native libtool-native libxml2-native"
 
-inherit autotools native
+inherit autotools texinfo native
 
 # autogen-native links against libguile which may have been relocated with sstate
 # these environment variables ensure there isn't a relocation issue