fbt: fixes (#1352)

* fbt: added --git-tasks; fixed typos
* fbt: fixed --extra-int-apps handling; scripts: moved storage.py & selfupdate.py to App() framework
* fbt: changed pseudo-builders to PhonyTargets with commands; added link to latest build dir as build/latest
* fbt: Restored old ep git handling
* fbt: dropped git tasks & dirlink.py
* fbt: removed extra quoting in fbt.cmd
* docs: added flash_usb to ReadMe.md

Co-authored-by: あく <alleteam@gmail.com>

site_scons/site_tools/openocd.py

@@ -7,7 +7,7 @@ __OPENOCD_BIN = "openocd"
 
 _oocd_action = Action(
     "${OPENOCD} ${OPENOCD_OPTS} ${OPENOCD_COMMAND}",
-    "${OOCDCOMSTR}",
+    "${OPENOCDCOMSTR}",
 )
 
 
@@ -16,12 +16,13 @@ def generate(env):
         OPENOCD=__OPENOCD_BIN,
         OPENOCD_OPTS="",
         OPENOCD_COMMAND="",
-        OOCDCOMSTR="",
+        OPENOCDCOM="${OPENOCD} ${OPENOCD_OPTS} ${OPENOCD_COMMAND}",
+        OPENOCDCOMSTR="",
     )
 
     env.Append(
         BUILDERS={
-            "OOCDFlashCommand": Builder(
+            "OpenOCDFlash": Builder(
                 action=[
                     _oocd_action,
                     Touch("${TARGET}"),
@@ -29,9 +30,6 @@ def generate(env):
                 suffix=".flash",
                 src_suffix=".bin",
             ),
-            "OOCDCommand": Builder(
-                action=_oocd_action,
-            ),
         }
     )