debuggers: import openocd-0.7.0

Initial check-in of openocd-0.7.0 as it can be downloaded from
http://sourceforge.net/projects/openocd/files/openocd/0.7.0/

Any modifications will follow.

Change-Id: I6949beaefd589e046395ea0cb80f4e1ab1654d55

debuggers/openocd/tcl/target/imx21.cfg

@@ -0,0 +1,34 @@
+#use combined on interfaces or targets that can't set TRST/SRST separately
+#
+# Hmmm.... should srst_pulls_trst be used here like i.MX27???
+reset_config trst_and_srst
+
+if { [info exists CHIPNAME] } {
+   set _CHIPNAME $CHIPNAME
+} else {
+   set _CHIPNAME imx21
+}
+
+if { [info exists ENDIAN] } {
+   set _ENDIAN $ENDIAN
+} else {
+   set _ENDIAN little
+}
+
+
+# Note above there is 1 tap
+
+# The CPU tap
+if { [info exists CPUTAPID] } {
+   set _CPUTAPID $CPUTAPID
+} else {
+   set _CPUTAPID 0x0792611f
+}
+jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
+
+
+# Create the GDB Target.
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME arm926ejs -endian $_ENDIAN -chain-position $_TARGETNAME -variant arm926ejs
+
+arm7_9 dcc_downloads enable