Remove launcher scripts from git

For a while now we have been mandating that bootstrap is run before
emscripten can be used.  This change removes most of the launcher
scripts from git (since we can rely on bootstrap to create them).

This helps clean up the top level directory.

I've left emcc and em++ launchers in source control.  If anyone runs
these without first running bootstrap it will ask them to first run
bootstrap.

Author: sbc100

.gitignore

@@ -30,8 +30,48 @@ coverage.xml
 # Test output
 /out/
 
-# All the ps1 files are generated by bootstrap...
+# Windows ps1 launchers (created by ./tools/maint/create_entry_points.py)
 *.ps1
 # ...except the templates.
 !/tools/run_python.ps1
 !/tools/run_python_compiler.ps1
+
+# Shell scripts (created by ./tools/maint/create_entry_points.py)
+em-config
+emar
+embuilder
+emcmake
+emconfigure
+emdump
+emdwp
+emmake
+emnm
+emprofile
+emranlib
+emrun
+emscan-deps
+emscons
+emsize
+emstrip
+emsymbolizer
+tools/file_packager
+
+# Windows .bat files (created by ./tools/maint/create_entry_points.py)
+em-config.bat
+emar.bat
+embuilder.bat
+emcmake.bat
+emconfigure.bat
+emdump.bat
+emdwp.bat
+emmake.bat
+emnm.bat
+emprofile.bat
+emranlib.bat
+emrun.bat
+emscan-deps.bat
+emscons.bat
+emsize.bat
+emstrip.bat
+emsymbolizer.bat
+tools/file_packager.bat