openocd: build: add SPDX tag

Add the SPDX tag to makefiles, configuration scripts and tcl files
present in the folders under src/

Change-Id: I1e4552aafe46ef4893d510da9d732c5f181784a4
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/7051
Tested-by: jenkins

src/jtag/Makefile.am

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 noinst_LTLIBRARIES += %D%/libjtag.la
 
 %C%_libjtag_la_LIBADD =

src/jtag/aice/Makefile.am

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 noinst_LTLIBRARIES += %D%/libocdaice.la
 
 %C%_libocdaice_la_CPPFLAGS = -I$(top_srcdir)/src/jtag/drivers $(AM_CPPFLAGS) $(LIBUSB1_CFLAGS)

src/jtag/drivers/Makefile.am

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 noinst_LTLIBRARIES += %D%/libocdjtagdrivers.la
 %C%_libocdjtagdrivers_la_LIBADD =
 

src/jtag/drivers/usb_blaster/Makefile.am

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 noinst_LTLIBRARIES += %D%/libocdusbblaster.la
 %C%_libocdusbblaster_la_SOURCES = $(USB_BLASTER_SRC)
 %C%_libocdusbblaster_la_CPPFLAGS = -I$(top_srcdir)/src/jtag/drivers $(AM_CPPFLAGS) $(LIBUSB1_CFLAGS) $(LIBFTDI_CFLAGS)

src/jtag/hla/Makefile.am

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 noinst_LTLIBRARIES += %D%/libocdhla.la
 
 %C%_libocdhla_la_SOURCES = \

src/jtag/startup.tcl

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # Defines basic Tcl procs for OpenOCD JTAG module
 
 # Executed during "init". Can be overridden