glib-2.0: fix host path appearing in gsocketclient-slow test script

Glib's build looks for the 'env' binary and embeds that path into the test
script, but thanks to hosttools this is /path/to/tmpdir/hosttools/env.

Fix this by hardcoding the path to env in the cross file.

Also as the cross file is only used in target builds only add it to SRC_URI for
target builds, so that changes to the cross file don't cause a rebuild of
glib-2.0-native.

(From OE-Core rev: 05c9fb5a026e3006a1fc037f957cb4341fb55030)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/glib-2.0/glib-2.0/glib-meson.cross

@@ -4,3 +4,6 @@ have_c99_snprintf = true
 have_unix98_printf = true
 va_val_copy = true
 growing_stack = false
+
+[binaries]
+env = "/usr/bin/env"

meta/recipes-core/glib-2.0/glib-2.0_2.60.3.bb

@@ -16,10 +16,10 @@ SRC_URI = "${GNOME_MIRROR}/glib/${SHRT_VER}/glib-${PV}.tar.xz \
            file://0001-Do-not-write-bindir-into-pkg-config-files.patch \
            file://0001-meson.build-do-not-hardcode-linux-as-the-host-system.patch \
            file://0001-meson-do-a-build-time-check-for-strlcpy-before-attem.patch \
-           file://glib-meson.cross \
            "
 
 SRC_URI_append_class-native = " file://relocate-modules.patch"
+SRC_URI_append_class-target = " file://glib-meson.cross"
 
 SRC_URI[md5sum] = "112a850caa8d2c21e24d4c9844e8b1fe"
 SRC_URI[sha256sum] = "04ab0d560d45790d055f50db2d69974eab8b693a77390075462c56e652b760b9"