Remove auto-generated files from git tracking.

.gitignore

@@ -144,3 +144,18 @@ qa/data/**/*.spice
 
 # Junk temp files generated by MSVC for resource files
 /resources/msw/RC*
+
+# generated by cmake
+/pcb_calculator/attenuators/bridget_tee_formula.h
+/eeschema/dialogs/dialog_bom_help_md.h
+/pcb_calculator/eseries_display_help.h
+/pcb_calculator/fusing_current_help.h
+/pcb_calculator/galvanic_corrosion_help.h
+/pcb_calculator/iec60664_help.h
+/pcb_calculator/attenuators/pi_formula.h
+/pcb_calculator/r_calculator_help.h
+/eeschema/sch_text_help_md.h
+/pcb_calculator/attenuators/splitter_formula.h
+/pcb_calculator/attenuators/tee_formula.h
+/pcb_calculator/tracks_width_versus_current_formula.h
+/eeschema/sim/user_defined_signals_help_md.h