Improves travis buildroot regexp

[jbrazio]

Follow up #3906: The regular expressions are not working properly as most of the Travis tests are outputting the text bellow, which is a sign of options aren't being manipulated.

Sketch uses 52,456 bytes (20%) of program storage space. Maximum is 253,952 bytes.
Global variables use 2,961 bytes (36%) of dynamic memory, leaving 5,231 bytes for local variables. Maximum is 8,192 bytes.

I also took the opportunity to upgrade travis Arduino IDE version to 1.6.9.

[thinkyhead]

Word boundaries, nice. I never knew about those in regular expressions.

Looks like the 1.6.9 changes aren't being taken well…

[jbrazio]

There is a known bug with ULTRA_LCD which was patched by @Blue-Marlin a few moments ago. This PR is supposed not to pass Travis because it makes that error visible.

[thinkyhead]

If that is so, you can rebase this against RCBugFix, force-push, and all should be well.

[jbrazio]

$ restore_configs
The command "restore_configs" exited with 0.

$ opt_enable ULTRA_LCD
The command "opt_enable ULTRA_LCD" exited with 0.

$ build_marlin
Picked up JAVA_TOOL_OPTIONS: 
Loading configuration...
Xlib:  extension "RANDR" missing on display ":1.0".
Initializing packages...
Preparing boards...
Verifying...
sketch/ultralcd.cpp: In function 'void lcd_update()':
ultralcd.cpp:2165: error: 'manage_manual_move' was not declared in this scope
   manage_manual_move();
                      ^
exit status 1
'manage_manual_move' was not declared in this scope
The command "build_marlin" exited with 1.

#3993 and #4001

[thinkyhead]

Strange. The manage_manual_move function is declared around line 1200, without any conditions.

EDIT: Actually, the code is just in a hard-to-see #if block. PR #4011 adjusts the indentation and wraps up more vars in the conditional.