glibc/gcc/libgcc-initial: Delete do_build tasks for -initial

We've had a lot of users running into RSS issues where -initial recipes
were being installed into sysroots alongside their counterparts and
causing overlapping files issues.

In general this was through do_build dependencies. Such dependencies are
bad in general and I'd encourage people to compare the taskgraphs with
using a more specific dependency like do_populate_sysroot, do_image_complete
or do_deploy as often the more specific dependency will result in a much
cleaner build.

Regardless, we don't want -initial dependencies getting in the way like
this and there are cases a do_build dependency could make sense.

Deleting the do_build task in these cases makes sense since this is not
a build "endpoint" we'd ever want a user to use, its a behind the scenes
piece of bootstrappping.

Unfortunately to make this work, we need a newer bitbake version which
has a bitbake bug fixed.

(From OE-Core rev: 04c053d42ab05f77b2d1ca93a0fabae44073d57e)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/glibc/glibc-initial.inc

@@ -52,3 +52,6 @@ do_siteconfig () {
 }
 
 inherit nopackages
+
+# We really only want this built by things that need it, not any recrdeptask
+deltask do_build

meta/recipes-devtools/gcc/gcc-cross-initial.inc

@@ -82,3 +82,7 @@ do_populate_sysroot[sstate-outputdirs] = "${STAGING_DIR}-components/${PACKAGE_AR
 inherit nopackages
 
 COMPILERINITIAL = "-initial"
+
+
+# We really only want this built by things that need it, not any recrdeptask
+deltask do_build

meta/recipes-devtools/gcc/libgcc-initial.inc

@@ -15,3 +15,6 @@ EXTRA_OECONF += "--disable-shared"
 COMPILERINITIAL = "-initial"
 
 inherit nopackages
+
+# We really only want this built by things that need it, not any recrdeptask
+deltask do_build