Improve single-source generation (#2989)

Detected and fixed minor issues with the single-source generation:
* On Windows the line info generation now correctly escapes the path separators.
* Fixed an incorrect C file include order. Now the global object C file is
  force included to get all common headers at the start in the generated source
  file.
* Added a missing colon which fixed the correct removal of the config.h include.
* Fix the command line help.
* Small typo fix.

JerryScript-DCO-1.0-Signed-off-by: Peter Gal pgal.u-szeged@partner.samsung.com

tools/srcgenerator.py

@@ -48,6 +48,9 @@ def generate_jerry_core(output_dir, verbose=False):
         '--input={}/api/jerry.c'.format(JERRY_CORE),
         '--output={}/jerryscript.c'.format(output_dir),
         '--append-c-files',
+        # Add the global built-in by default to include some common items
+        # to avoid problems with common built-in headers
+        '--input={}/ecma/builtin-objects/ecma-builtins.c'.format(JERRY_CORE),
         '--remove-include=jerryscript.h',
         '--remove-include=jerryscript-port.h',
         '--remove-include=jerryscript-compiler.h',
@@ -55,7 +58,7 @@ def generate_jerry_core(output_dir, verbose=False):
         '--remove-include=jerryscript-debugger.h',
         '--remove-include=jerryscript-debugger-transport.h',
         '--remove-include=jerryscript-port.h',
-        '--remove-include=jerryscript-snapshot.h'
+        '--remove-include=jerryscript-snapshot.h',
         '--remove-include=config.h',
         '--push-include=jerryscript.h',
     ]