classes: drop image dependencies on TOPDIR variable

We don't need a dependency on this variable changing, and having one
causes locked signature warnings during eSDK installation if you have
INITRAMFS_IMAGE_* set (since TOPDIR will always be different between
the eSDK and the environment in which it was built).

Relates to [YOCTO #12102].

(From OE-Core master rev: 073610af04be326f9245ca91714526b390fb72cd)

(From OE-Core rev: 94a9f9a7dc5a736b7986b889895c736f02110715)

(From OE-Core rev: 8bf158857d7c597c58efc4023bdd9c2785d43ad3)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/image_types_wic.bbclass

@@ -33,7 +33,7 @@ IMAGE_CMD_wic () {
 	mv "$out/$(basename "${wks%.wks}")"*.direct "$out${IMAGE_NAME_SUFFIX}.wic"
 	rm -rf "$out/"
 }
-IMAGE_CMD_wic[vardepsexclude] = "WKS_FULL_PATH WKS_FILES"
+IMAGE_CMD_wic[vardepsexclude] = "WKS_FULL_PATH WKS_FILES TOPDIR"
 
 # Rebuild when the wks file or vars in WICVARS change
 USING_WIC = "${@bb.utils.contains_any('IMAGE_FSTYPES', 'wic ' + ' '.join('wic.%s' % c for c in '${CONVERSIONTYPES}'.split()), '1', '', d)}"

meta/classes/qemuboot.bbclass

@@ -79,6 +79,7 @@ def qemuboot_vars(d):
     return build_vars + [k for k in d.keys() if k.startswith('QB_')]
 
 do_write_qemuboot_conf[vardeps] += "${@' '.join(qemuboot_vars(d))}"
+do_write_qemuboot_conf[vardepsexclude] += "TOPDIR"
 python do_write_qemuboot_conf() {
     import configparser
 

meta/classes/rootfs-postcommands.bbclass

@@ -305,6 +305,7 @@ python write_image_test_data() {
            os.remove(testdata_link)
         os.symlink(os.path.basename(testdata), testdata_link)
 }
+write_image_test_data[vardepsexclude] += "TOPDIR"
 
 # Check for unsatisfied recommendations (RRECOMMENDS)
 python rootfs_log_check_recommends() {