[TIMOB-2253] Build issues for First Time Developers

SUMMARY
When developing with Titanium on Mac OS X (e.g. 10.6.4) for the first time, a test project may likely fail. This happened to me internally, and per Ralf, an external OS X developer following the same prescribed set of steps and versions of all software. The behavior is the difference between downloading Titanium Mobile 1.4.1.1 with the test working, but using git to clone 1.5.0 (the latest stable release), and scons to build it, results in "execute_xcode" reporting an ERROR per the output below:

DIAGNOSTIC OUTPUT
[ERROR] Error: Traceback (most recent call last): File "/Library/Application Support/Titanium/mobilesdk/osx/1.5.0/iphone/builder.py", line 866, in main
execute_xcode("iphonesimulator%s" % iphone_version,["GCC_PREPROCESSOR_DEFINITIONS=LOGID__=%s DEPLOYTYPE=development TI_DEVELOPMENT=1 DEBUG=1 TI_VERSION=%s" % (log_id,sdk_version)],False)
File "/Library/Application Support/Titanium/mobilesdk/osx/1.5.0/iphone/builder.py", line 789, in execute_xcode
output = run.run(args,False,False,o)
File "/Library/Application Support/Titanium/mobilesdk/osx/1.5.0/iphone/run.py", line 31, in run
sys.exit(rc)
SystemExit: 1

For further detail, if one sees this behavior, there's more information in build.log (under <YOUR_PROJECT>/build/iphone/build/build.log.

WORKAROUND:
First by deleting the files in the project's build/iphone directory, and then rebuilding, the error went away.

Ralf couldn't reproduce this:
• a recent change (unknown at this point) may have created a "build by-products" issue (i.e. in 1.5.0 from earlier),
• an external developer ran into the same symptoms (see Ralf): Titanium Developer outputs: "builder.py [ERROR]" (see above)

IMPACT:
Developers starting from scratch, like a new (a clean Mac, fresh installs), may benefit from this workaround, but we should explored it more detail

ISSUES
- Potentially renaming or moving the Titanium SDK folder doesn't change the outcome, and adding spaces like 1.5.0 11_01 may worsens it - Adding spaces to the Titanium SDK path may reveal further bugs and should be tested