Add gdbinit and gitignore files

.gdbinit

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+
+target remote localhost:3333
+set print pretty on
+set print elements 512
+
+# Update GDB's Python paths with the `sys.path` values of the local Python installation,
+#  whether that is brew'ed Python, a virtualenv, or another system python.
+
+# Convert GDB to interpret in Python
+python
+import os,subprocess,sys
+# Execute a Python using the user's shell and pull out the sys.path (for site-packages)
+paths = subprocess.check_output('python -c "import os,sys;print(os.linesep.join(sys.path).strip())"',shell=True).decode("utf-8").split()
+# Extend GDB's Python's search path
+sys.path.extend(paths)
+end
+
+source ~/ref/PyCortexMDebug/cmdebug/svd_gdb.py
+svd_load ~/ref/stm32square/svd/STM32F103.svd
+

.gitignore

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+**/__pycache__
+build